664727376 has 40 divisors (see below), whose sum is σ = 1718327520. Its totient is φ = 221431936.

The previous prime is 664727363. The next prime is 664727417. The reversal of 664727376 is 673727466.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91195 + ... + 98213.

It is an arithmetic number, because the mean of its divisors is an integer number (42958188).

Almost surely, 2^664727376 is an apocalyptic number.

It is an amenable number.

664727376 is an abundant number, since it is smaller than the sum of its proper divisors (1053600144).

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

664727376 is a wasteful number, since it uses less digits than its factorization.

664727376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9003 (or 8997 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 48.

The square root of 664727376 is about 25782.3074219512. The cubic root of 664727376 is about 872.7325788345.

The spelling of 664727376 in words is "six hundred sixty-four million, seven hundred twenty-seven thousand, three hundred seventy-six".