670395664 has 15 divisors (see below), whose sum is σ = 1299092293. Its totient is φ = 335146048.

The previous prime is 670395653. The next prime is 670395707. The reversal of 670395664 is 466593076.

The square root of 670395664 is 25892.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 123210000 + 547185664 = 11100^2 + 23392^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 100332 + ... + 106804.

Almost surely, 2^670395664 is an apocalyptic number.

670395664 is the 25892-nd square number.

It is an amenable number.

670395664 is a deficient number, since it is larger than the sum of its proper divisors (628696629).

670395664 is an frugal number, since it uses more digits than its factorization.

670395664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12954 (or 6475 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 46.

The cubic root of 670395664 is about 875.2062268740.

The spelling of 670395664 in words is "six hundred seventy million, three hundred ninety-five thousand, six hundred sixty-four".