165 (number)

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.
• the number of prime knots with 10 crossings.
• the sum of the sums of the divisors of the first 14 positive integers.
• 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