664731602 has 16 divisors (see below), whose sum is σ = 1042554240. Its totient is φ = 317272032.

The previous prime is 664731553. The next prime is 664731619. The reversal of 664731602 is 206137466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8774 + ... + 37502.

It is an arithmetic number, because the mean of its divisors is an integer number (65159640).

Almost surely, 2^664731602 is an apocalyptic number.

664731602 is a deficient number, since it is larger than the sum of its proper divisors (377822638).

664731602 is a wasteful number, since it uses less digits than its factorization.

664731602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29257.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 664731602 is about 25782.3893772474. The cubic root of 664731602 is about 872.7344282945.

The spelling of 664731602 in words is "six hundred sixty-four million, seven hundred thirty-one thousand, six hundred two".