664377265 has 16 divisors (see below), whose sum is σ = 803358720. Its totient is φ = 527446080.

The previous prime is 664377227. The next prime is 664377271. The reversal of 664377265 is 562773466.

It is not a de Polignac number, because 664377265 - 2²⁷ = 530159537 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722476 + ... + 723394.

It is an arithmetic number, because the mean of its divisors is an integer number (50209920).

Almost surely, 2^664377265 is an apocalyptic number.

It is an amenable number.

664377265 is a deficient number, since it is larger than the sum of its proper divisors (138981455).

664377265 is a wasteful number, since it uses less digits than its factorization.

664377265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872.

The product of its digits is 1270080, while the sum is 46.

The square root of 664377265 is about 25775.5167746449. The cubic root of 664377265 is about 872.5793295740.

The spelling of 664377265 in words is "six hundred sixty-four million, three hundred seventy-seven thousand, two hundred sixty-five".