664874922 has 16 divisors (see below), whose sum is σ = 1330115040. Its totient is φ = 221564112.

The previous prime is 664874921. The next prime is 664874927. The reversal of 664874922 is 229478466.

It is not an unprimeable number, because it can be changed into a prime (664874921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12273 + ... + 38475.

It is an arithmetic number, because the mean of its divisors is an integer number (83132190).

Almost surely, 2^664874922 is an apocalyptic number.

664874922 is an abundant number, since it is smaller than the sum of its proper divisors (665240118).

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

664874922 is a wasteful number, since it uses less digits than its factorization.

664874922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30437.

The product of its digits is 1161216, while the sum is 48.

The square root of 664874922 is about 25785.1686440093. The cubic root of 664874922 is about 872.7971459937.

The spelling of 664874922 in words is "six hundred sixty-four million, eight hundred seventy-four thousand, nine hundred twenty-two".