79964665 has 12 divisors (see below), whose sum is σ = 105474852. Its totient is φ = 58155680.

The previous prime is 79964639. The next prime is 79964693. The reversal of 79964665 is 56646997.

It can be written as a sum of positive squares in 2 ways, for example, as 25160256 + 54804409 = 5016^2 + 7403^2 .

It is not a de Polignac number, because 79964665 - 2¹⁹ = 79440377 is a prime.

It is a Duffinian number.

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 in 11 ways as a sum of consecutive naturals, for example, 65482 + ... + 66691.

It is an arithmetic number, because the mean of its divisors is an integer number (8789571).

Almost surely, 2^79964665 is an apocalyptic number.

It is an amenable number.

79964665 is a deficient number, since it is larger than the sum of its proper divisors (25510187).

79964665 is a wasteful number, since it uses less digits than its factorization.

79964665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132200 (or 132189 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 52.

The square root of 79964665 is about 8942.2964052865. The cubic root of 79964665 is about 430.8234895392.

The spelling of 79964665 in words is "seventy-nine million, nine hundred sixty-four thousand, six hundred sixty-five".