664659318 has 16 divisors (see below), whose sum is σ = 1329621696. Its totient is φ = 221502600.

The previous prime is 664659301. The next prime is 664659337. The reversal of 664659318 is 813956466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24105 + ... + 43707.

It is an arithmetic number, because the mean of its divisors is an integer number (83101356).

Almost surely, 2^664659318 is an apocalyptic number.

664659318 is an abundant number, since it is smaller than the sum of its proper divisors (664962378).

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

664659318 is a wasteful number, since it uses less digits than its factorization.

664659318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25259.

The product of its digits is 933120, while the sum is 48.

The square root of 664659318 is about 25780.9875295730. The cubic root of 664659318 is about 872.7027929588.

The spelling of 664659318 in words is "six hundred sixty-four million, six hundred fifty-nine thousand, three hundred eighteen".