664620332 has 36 divisors (see below), whose sum is σ = 1205617560. Its totient is φ = 320547840.

The previous prime is 664620317. The next prime is 664620349. The reversal of 664620332 is 233026466.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 651719 + ... + 652737.

Almost surely, 2^664620332 is an apocalyptic number.

It is an amenable number.

664620332 is a deficient number, since it is larger than the sum of its proper divisors (540997228).

664620332 is a wasteful number, since it uses less digits than its factorization.

664620332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202 (or 1159 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 664620332 is about 25780.2314186665. The cubic root of 664620332 is about 872.6857296526.

Adding to 664620332 its reverse (233026466), we get a palindrome (897646798).

The spelling of 664620332 in words is "six hundred sixty-four million, six hundred twenty thousand, three hundred thirty-two".