664742264 has 16 divisors (see below), whose sum is σ = 1247286600. Its totient is φ = 332132512.

The previous prime is 664742249. The next prime is 664742359. The reversal of 664742264 is 462247466.

It is a congruent number.

It is an unprimeable number.

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, 17699 + ... + 40530.

Almost surely, 2^664742264 is an apocalyptic number.

It is an amenable number.

664742264 is a deficient number, since it is larger than the sum of its proper divisors (582544336).

664742264 is a wasteful number, since it uses less digits than its factorization.

664742264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59662 (or 59658 counting only the distinct ones).

The product of its digits is 387072, while the sum is 41.

The square root of 664742264 is about 25782.5961454622. The cubic root of 664742264 is about 872.7390943606.

The spelling of 664742264 in words is "six hundred sixty-four million, seven hundred forty-two thousand, two hundred sixty-four".