664418490 has 32 divisors (see below), whose sum is σ = 1606253760. Its totient is φ = 175883904.

The previous prime is 664418477. The next prime is 664418591. The reversal of 664418490 is 94814466.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76720 + ... + 84939.

It is an arithmetic number, because the mean of its divisors is an integer number (50195430).

Almost surely, 2^664418490 is an apocalyptic number.

664418490 is an abundant number, since it is smaller than the sum of its proper divisors (941835270).

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

664418490 is a wasteful number, since it uses less digits than its factorization.

664418490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161806.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 664418490 is about 25776.3164552269. The cubic root of 664418490 is about 872.5973772209.

The spelling of 664418490 in words is "six hundred sixty-four million, four hundred eighteen thousand, four hundred ninety".