664981464 has 64 divisors (see below), whose sum is σ = 1951315200. Its totient is φ = 184857984.

The previous prime is 664981439. The next prime is 664981477. The reversal of 664981464 is 464189466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47274 + ... + 59705.

It is an arithmetic number, because the mean of its divisors is an integer number (30489300).

Almost surely, 2^664981464 is an apocalyptic number.

It is an amenable number.

664981464 is an abundant number, since it is smaller than the sum of its proper divisors (1286333736).

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

664981464 is a wasteful number, since it uses less digits than its factorization.

664981464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107032 (or 107028 counting only the distinct ones).

The product of its digits is 995328, while the sum is 48.

The square root of 664981464 is about 25787.2345163261. The cubic root of 664981464 is about 872.8437635774.

The spelling of 664981464 in words is "six hundred sixty-four million, nine hundred eighty-one thousand, four hundred sixty-four".