556065665 has 16 divisors (see below), whose sum is σ = 719867088. Its totient is φ = 410781696.

The previous prime is 556065661. The next prime is 556065667. The reversal of 556065665 is 566560655.

It can be written as a sum of positive squares in 8 ways, for example, as 36590401 + 519475264 = 6049^2 + 22792^2 .

It is a cyclic number.

It is not a de Polignac number, because 556065665 - 2² = 556065661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556065661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57212 + ... + 66221.

It is an arithmetic number, because the mean of its divisors is an integer number (44991693).

Almost surely, 2^556065665 is an apocalyptic number.

It is an amenable number.

556065665 is a deficient number, since it is larger than the sum of its proper divisors (163801423).

556065665 is a wasteful number, since it uses less digits than its factorization.

556065665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123508.

The product of its (nonzero) digits is 810000, while the sum is 44.

The square root of 556065665 is about 23581.0446121456. The cubic root of 556065665 is about 822.3222220885.

The spelling of 556065665 in words is "five hundred fifty-six million, sixty-five thousand, six hundred sixty-five".