166 (number)

166 (one hundred [and] sixty-six) is the natural number following 165 and preceding 167.

← 165 166 167 →
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Cardinal	one hundred sixty-six
Ordinal	166th (one hundred sixty-sixth)
Factorization	2 × 83
Divisors	1, 2, 83, 166
Greek numeral	ΡΞϚ´
Roman numeral	CLXVI
Binary	101001102
Ternary	200113
Quaternary	22124
Quinary	11315
Senary	4346
Octal	2468
Duodecimal	11A12
Hexadecimal	A616
Vigesimal	8620
Base 36	4M36

In mathematics

166 is an even number and a composite number. It is a centered triangular number.[1]

Given 166, the Mertens function returns 0. 166 is a Smith number in base 10.[2]

In astronomy

• 166 Rhodope is a dark main belt asteroid, in the Adeona family of asteroids
• 166P/NEAT is a periodic comet and centaur in the outer solar system
• HD 166 is the 6th magnitude star in the constellation Andromeda

In the military

• 166th Signal Photo Company was the official photo unit in the 89th Division of George Patton's Third Army in World War II
• Convoy ON-166 was the 166th of the numbered ON series of merchant ship convoys outbound from the British Isles to North America departing February 11, 1943
• Marine Medium Helicopter Squadron 166 is a United States Marine Corps helicopter
• USCGC Tamaroa (WMEC-166) was a United States Coast Guard cutter during World War II
• USS Alcedo (SP-166) was a United States Navy yacht. She was the first American vessel lost in World War I
• USS Baron (DE-166) was a United States Navy Cannon-class destroyer escort during World War II
• USS Bush (DD-166) was a United States Navy Wickes-class destroyer during the World War I
• USS Cabell (AK-166) was a United States Navy Alamosa-class cargo ship during World War II
• USS Fond du Lac (APA-166) was a United States Navy Haskell-class attack transport ship during World War II
• USS Jamestown (AGTR-3/AG-166) was a United States Navy Oxford-class technical research ship following World War II

In sports

• Sam Thompson’s 166 RBIs in 1887 stood as a Major League Baseball record until Babe Ruth broke the record in 1921

In transportation

• British Rail Class 166
• The now-defunct elevated IRT Third Avenue Line, 166th Street station in the Bronx, New York
• London Buses route 166
• Piaggio P.166 is a twin-engined push prop-driven utility aircraft developed by the Italian aircraft manufacturer Piaggio
• Banat Air Flight 166 crashed on take-off en route from Romania on December 13, 1995
• Alfa Romeo 166 and 166 2.4 JTD produced from 1998–2007
• Ferrari 166 model cars produced from 1948–1953
  • Ferrari 166 Inter (1949) Coachbuilt street coupe and cabriolet

In other fields

166 is also:

• The year AD 166 or 166 BC
• The atomic number of an element temporarily called Unhexhexium

See also

• List of highways numbered 166
• United States Supreme Court cases, Volume 166
• United Nations Security Council Resolution 166

External links

• Number Facts and Trivia: 166
• The Number 166
• VirtueScience: 166
• 166th Street (3rd Avenue El)

References

1. "Sloane's A005448 : Centered triangular numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
2. "Sloane's A006753 : Smith numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.