165954972 has 24 divisors (see below), whose sum is σ = 391223056. Its totient is φ = 54747648.

The previous prime is 165954961. The next prime is 165954989. The reversal of 165954972 is 279459561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70123 + ... + 72450.

Almost surely, 2^165954972 is an apocalyptic number.

165954972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165954972 is an abundant number, since it is smaller than the sum of its proper divisors (225268084).

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

165954972 is a wasteful number, since it uses less digits than its factorization.

165954972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142677 (or 142675 counting only the distinct ones).

The product of its digits is 680400, while the sum is 48.

The square root of 165954972 is about 12882.3511829169. The cubic root of 165954972 is about 549.5367691877.

The spelling of 165954972 in words is "one hundred sixty-five million, nine hundred fifty-four thousand, nine hundred seventy-two".