165044657 has 2 divisors, whose sum is σ = 165044658. Its totient is φ = 165044656.

The previous prime is 165044647. The next prime is 165044723. The reversal of 165044657 is 756440561.

165044657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137334961 + 27709696 = 11719^2 + 5264^2 .

It is a cyclic number.

It is not a de Polignac number, because 165044657 - 2⁴ = 165044641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165044657.

It is not a weakly prime, because it can be changed into another prime (165044617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82522328 + 82522329.

It is an arithmetic number, because the mean of its divisors is an integer number (82522329).

Almost surely, 2^165044657 is an apocalyptic number.

It is an amenable number.

165044657 is a deficient number, since it is larger than the sum of its proper divisors (1).

165044657 is an equidigital number, since it uses as much as digits as its factorization.

165044657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 165044657 is about 12846.9707324334. The cubic root of 165044657 is about 548.5301325993.

The spelling of 165044657 in words is "one hundred sixty-five million, forty-four thousand, six hundred fifty-seven".