165 is:
- an odd number, a composite number, and a deficient number.
- a sphenic number.
- a tetrahedral number
- 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 (10100101) and bases 14 (BB), 32 (55) and 54 (33).
- a unique period in base 2.
I'm sold