664402875 has 16 divisors (see below), whose sum is σ = 1105567008. Its totient is φ = 354348000.

The previous prime is 664402873. The next prime is 664402883. The reversal of 664402875 is 578204466.

It is not a de Polignac number, because 664402875 - 2¹ = 664402873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664402873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 885496 + ... + 886245.

It is an arithmetic number, because the mean of its divisors is an integer number (69097938).

Almost surely, 2^664402875 is an apocalyptic number.

664402875 is a deficient number, since it is larger than the sum of its proper divisors (441164133).

664402875 is a wasteful number, since it uses less digits than its factorization.

664402875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771759 (or 1771749 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 664402875 is about 25776.0135591212. The cubic root of 664402875 is about 872.5905413110.

The spelling of 664402875 in words is "six hundred sixty-four million, four hundred two thousand, eight hundred seventy-five".