664494016 has 28 divisors (see below), whose sum is σ = 1334502792. Its totient is φ = 328241408.

The previous prime is 664494013. The next prime is 664494029. The reversal of 664494016 is 610494466.

It is a self number, because there is not a number n which added to its sum of digits gives 664494016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664494013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57235 + ... + 67858.

It is an arithmetic number, because the mean of its divisors is an integer number (47660814).

Almost surely, 2^664494016 is an apocalyptic number.

It is an amenable number.

664494016 is an abundant number, since it is smaller than the sum of its proper divisors (670008776).

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

664494016 is a wasteful number, since it uses less digits than its factorization.

664494016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125188 (or 125178 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 664494016 is about 25777.7814406128. The cubic root of 664494016 is about 872.6304393615.

The spelling of 664494016 in words is "six hundred sixty-four million, four hundred ninety-four thousand, sixteen".