165806956 has 12 divisors (see below), whose sum is σ = 331613968. Its totient is φ = 71060112.

The previous prime is 165806923. The next prime is 165806959. The reversal of 165806956 is 659608561.

165806956 is an admirable number.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (165806959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2960811 + ... + 2960866.

Almost surely, 2^165806956 is an apocalyptic number.

It is an amenable number.

165806956 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

165806956 is a wasteful number, since it uses less digits than its factorization.

165806956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921688 (or 5921686 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 165806956 is about 12876.6049873404. The cubic root of 165806956 is about 549.3733424701.

The spelling of 165806956 in words is "one hundred sixty-five million, eight hundred six thousand, nine hundred fifty-six".