664679384 has 32 divisors (see below), whose sum is σ = 1270328400. Its totient is φ = 325987200.

The previous prime is 664679383. The next prime is 664679387. The reversal of 664679384 is 483976466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664679383) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 84299 + ... + 91845.

Almost surely, 2^664679384 is an apocalyptic number.

It is an amenable number.

664679384 is a deficient number, since it is larger than the sum of its proper divisors (605649016).

664679384 is a wasteful number, since it uses less digits than its factorization.

664679384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7763 (or 7759 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 53.

The square root of 664679384 is about 25781.3766893857. The cubic root of 664679384 is about 872.7115751412.

The spelling of 664679384 in words is "six hundred sixty-four million, six hundred seventy-nine thousand, three hundred eighty-four".