664549522 has 32 divisors (see below), whose sum is σ = 1239541632. Its totient is φ = 260181504.

The previous prime is 664549517. The next prime is 664549531. The reversal of 664549522 is 225945466.

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, 1168 + ... + 36475.

It is an arithmetic number, because the mean of its divisors is an integer number (38735676).

Almost surely, 2^664549522 is an apocalyptic number.

664549522 is a deficient number, since it is larger than the sum of its proper divisors (574992110).

664549522 is a wasteful number, since it uses less digits than its factorization.

664549522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37762.

The product of its digits is 518400, while the sum is 43.

The square root of 664549522 is about 25778.8580429778. The cubic root of 664549522 is about 872.6547359819.

The spelling of 664549522 in words is "six hundred sixty-four million, five hundred forty-nine thousand, five hundred twenty-two".