165654656 has 16 divisors (see below), whose sum is σ = 330015390. Its totient is φ = 82827264.

The previous prime is 165654617. The next prime is 165654683. The reversal of 165654656 is 656456561.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 156750400 + 8904256 = 12520^2 + 2984^2 .

It is a tau number, because it is divible by the number of its divisors (16).

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, 646961 + ... + 647216.

Almost surely, 2^165654656 is an apocalyptic number.

165654656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165654656 is a deficient number, since it is larger than the sum of its proper divisors (164360734).

165654656 is an equidigital number, since it uses as much as digits as its factorization.

165654656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294191 (or 1294179 counting only the distinct ones).

The product of its digits is 648000, while the sum is 44.

The square root of 165654656 is about 12870.6898028039. The cubic root of 165654656 is about 549.2050841673.

The spelling of 165654656 in words is "one hundred sixty-five million, six hundred fifty-four thousand, six hundred fifty-six".