664360522 has 12 divisors (see below), whose sum is σ = 1159241490. Its totient is φ = 284725896.

The previous prime is 664360513. The next prime is 664360537. The reversal of 664360522 is 225063466.

664360522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 574129521 + 90231001 = 23961^2 + 9499^2 .

It is a super-2 number, since 2×664360522² = 882749806384224968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3389497 + ... + 3389692.

Almost surely, 2^664360522 is an apocalyptic number.

664360522 is a deficient number, since it is larger than the sum of its proper divisors (494880968).

664360522 is a wasteful number, since it uses less digits than its factorization.

664360522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6779205 (or 6779198 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 664360522 is about 25775.1919876458. The cubic root of 664360522 is about 872.5719995427.

The spelling of 664360522 in words is "six hundred sixty-four million, three hundred sixty thousand, five hundred twenty-two".