165900918 has 32 divisors (see below), whose sum is σ = 339165792. Its totient is φ = 54080000.

The previous prime is 165900901. The next prime is 165900961. The reversal of 165900918 is 819009561.

It is a super-2 number, since 2×165900918² = 55046229186485448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126868 + ... + 128168.

It is an arithmetic number, because the mean of its divisors is an integer number (10598931).

Almost surely, 2^165900918 is an apocalyptic number.

165900918 is an abundant number, since it is smaller than the sum of its proper divisors (173264874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165900918 is a wasteful number, since it uses less digits than its factorization.

165900918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 165900918 is about 12880.2530254650. The cubic root of 165900918 is about 549.4770986119.

The spelling of 165900918 in words is "one hundred sixty-five million, nine hundred thousand, nine hundred eighteen".