664925836 has 6 divisors (see below), whose sum is σ = 1163620220. Its totient is φ = 332462916.

The previous prime is 664925831. The next prime is 664925861. The reversal of 664925836 is 638529466.

It is a super-3 number, since 3×664925836³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664925836.

It is not an unprimeable number, because it can be changed into a prime (664925831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83115726 + ... + 83115733.

Almost surely, 2^664925836 is an apocalyptic number.

It is an amenable number.

664925836 is a deficient number, since it is larger than the sum of its proper divisors (498694384).

664925836 is a wasteful number, since it uses less digits than its factorization.

664925836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166231463 (or 166231461 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 49.

The square root of 664925836 is about 25786.1558980783. The cubic root of 664925836 is about 872.8194240986.

The spelling of 664925836 in words is "six hundred sixty-four million, nine hundred twenty-five thousand, eight hundred thirty-six".