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165 (number)
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165 1, 3, 5, 11, 15, 33, 55, 165
165 (one hundred [and] sixty-five) is the natural number following 164 and preceding 166.
In mathematics
165 is:
an odd number, a composite number, and a deficient number.
a sphenic number.
a tetrahedral number.https://oeis.org/A000292 Sloane's A000292 : Tetrahedral numbers The On-Line Encyclopedia of Integer Sequences OEIS Foundation 2016-05-28
the number of prime knots with 10 crossings.A002863 Number of prime knots with n crossings
the sum of the sums of the divisors of the first 14 positive integers.A024916 sum_{k=1..n} sigma(k) where sigma(n) = sum of divisors of n
a self number in base 10.
a palindromic number in binary (101001012) and bases 14 (BB14), 32 (5532) and 54 (3354).
a unique period in base 2.
the number of Wikipedias (including closed and deleted ones).
References
External links
Number Facts and Trivia: 165
The Number 165
The Positive Integer 165
VirtueScience: 165 https://web.archive.org/web/20210121181148/https://www.virtuescience.com/165.html 2021-01-21
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Category:Integers