664714528 has 12 divisors (see below), whose sum is σ = 1308656790. Its totient is φ = 332357248.

The previous prime is 664714507. The next prime is 664714553. The reversal of 664714528 is 825417466.

It can be written as a sum of positive squares in only one way, i.e., 623600784 + 41113744 = 24972^2 + 6412^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10386133 + ... + 10386196.

Almost surely, 2^664714528 is an apocalyptic number.

It is an amenable number.

664714528 is a deficient number, since it is larger than the sum of its proper divisors (643942262).

664714528 is a wasteful number, since it uses less digits than its factorization.

664714528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20772339 (or 20772331 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 664714528 is about 25782.0582576333. The cubic root of 664714528 is about 872.7269560079.

The spelling of 664714528 in words is "six hundred sixty-four million, seven hundred fourteen thousand, five hundred twenty-eight".