664204646024 has 32 divisors (see below), whose sum is σ = 1258203254040. Its totient is φ = 328686336000.

The previous prime is 664204646009. The next prime is 664204646041. The reversal of 664204646024 is 420646402466.

It can be written as a sum of positive squares in 4 ways, for example, as 641136504100 + 23068141924 = 800710^2 + 151882^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1936634 + ... + 2253654.

Almost surely, 2^664204646024 is an apocalyptic number.

It is an amenable number.

664204646024 is a deficient number, since it is larger than the sum of its proper divisors (593998608016).

664204646024 is a wasteful number, since it uses less digits than its factorization.

664204646024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319721 (or 319717 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 44.

The spelling of 664204646024 in words is "six hundred sixty-four billion, two hundred four million, six hundred forty-six thousand, twenty-four".