664704486 has 12 divisors (see below), whose sum is σ = 1440193092. Its totient is φ = 221568156.

The previous prime is 664704463. The next prime is 664704487. The reversal of 664704486 is 684407466.

664704486 is a `hidden beast` number, since 66 + 470 + 44 + 86 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664704487) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18463996 + ... + 18464031.

It is an arithmetic number, because the mean of its divisors is an integer number (120016091).

Almost surely, 2^664704486 is an apocalyptic number.

664704486 is an abundant number, since it is smaller than the sum of its proper divisors (775488606).

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

664704486 is a wasteful number, since it uses less digits than its factorization.

664704486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36928035 (or 36928032 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The square root of 664704486 is about 25781.8635090639. The cubic root of 664704486 is about 872.7225611547.

The spelling of 664704486 in words is "six hundred sixty-four million, seven hundred four thousand, four hundred eighty-six".