165906957 has 16 divisors (see below), whose sum is σ = 226215360. Its totient is φ = 108129792.

The previous prime is 165906929. The next prime is 165906967. The reversal of 165906957 is 759609561.

It is not a de Polignac number, because 165906957 - 2⁸ = 165906701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165906967) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 20719 + ... + 27587.

It is an arithmetic number, because the mean of its divisors is an integer number (14138460).

Almost surely, 2^165906957 is an apocalyptic number.

It is an amenable number.

165906957 is a deficient number, since it is larger than the sum of its proper divisors (60308403).

165906957 is an equidigital number, since it uses as much as digits as its factorization.

165906957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7052.

The product of its (nonzero) digits is 510300, while the sum is 48.

The square root of 165906957 is about 12880.4874519562. The cubic root of 165906957 is about 549.4837657479.

The spelling of 165906957 in words is "one hundred sixty-five million, nine hundred six thousand, nine hundred fifty-seven".