664792667 has 64 divisors (see below), whose sum is σ = 931627008. Its totient is φ = 458304000.

The previous prime is 664792657. The next prime is 664792669. The reversal of 664792667 is 766297466.

It is not a de Polignac number, because 664792667 - 2⁴ = 664792651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664792669) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2137442 + ... + 2137752.

It is an arithmetic number, because the mean of its divisors is an integer number (14556672).

Almost surely, 2^664792667 is an apocalyptic number.

664792667 is a deficient number, since it is larger than the sum of its proper divisors (266834341).

664792667 is a wasteful number, since it uses less digits than its factorization.

664792667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440.

The product of its digits is 4572288, while the sum is 53.

The square root of 664792667 is about 25783.5735886242. The cubic root of 664792667 is about 872.7611518101.

The spelling of 664792667 in words is "six hundred sixty-four million, seven hundred ninety-two thousand, six hundred sixty-seven".