664368507 has 32 divisors (see below), whose sum is σ = 1091358720. Its totient is φ = 396036000.

The previous prime is 664368503. The next prime is 664368521. The reversal of 664368507 is 705863466.

It is not a de Polignac number, because 664368507 - 2² = 664368503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664368503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219 + ... + 36452.

It is an arithmetic number, because the mean of its divisors is an integer number (34104960).

Almost surely, 2^664368507 is an apocalyptic number.

664368507 is a deficient number, since it is larger than the sum of its proper divisors (426990213).

664368507 is a wasteful number, since it uses less digits than its factorization.

664368507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36752 (or 36746 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 664368507 is about 25775.3468841837. The cubic root of 664368507 is about 872.5754953653.

The spelling of 664368507 in words is "six hundred sixty-four million, three hundred sixty-eight thousand, five hundred seven".