165798956 has 6 divisors (see below), whose sum is σ = 290148180. Its totient is φ = 82899476.

The previous prime is 165798931. The next prime is 165798967. The reversal of 165798956 is 659897561.

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 as a sum of consecutive naturals, namely, 20724866 + ... + 20724873.

It is an arithmetic number, because the mean of its divisors is an integer number (48358030).

Almost surely, 2^165798956 is an apocalyptic number.

It is an amenable number.

165798956 is a deficient number, since it is larger than the sum of its proper divisors (124349224).

165798956 is a wasteful number, since it uses less digits than its factorization.

165798956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41449743 (or 41449741 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 56.

The square root of 165798956 is about 12876.2943427059. The cubic root of 165798956 is about 549.3645067785.

The spelling of 165798956 in words is "one hundred sixty-five million, seven hundred ninety-eight thousand, nine hundred fifty-six".