664838672376 has 64 divisors (see below), whose sum is σ = 1679392915200. Its totient is φ = 219309700608.

The previous prime is 664838672341. The next prime is 664838672389. The reversal of 664838672376 is 673276838466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3514480 + ... + 3698816.

It is an arithmetic number, because the mean of its divisors is an integer number (26240514300).

Almost surely, 2^664838672376 is an apocalyptic number.

It is an amenable number.

664838672376 is an abundant number, since it is smaller than the sum of its proper divisors (1014554242824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664838672376 is a wasteful number, since it uses less digits than its factorization.

664838672376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185908 (or 185904 counting only the distinct ones).

The product of its digits is 292626432, while the sum is 66.

The spelling of 664838672376 in words is "six hundred sixty-four billion, eight hundred thirty-eight million, six hundred seventy-two thousand, three hundred seventy-six".