664831796 has 6 divisors (see below), whose sum is σ = 1163455650. Its totient is φ = 332415896.

The previous prime is 664831789. The next prime is 664831829. The reversal of 664831796 is 697138466.

It can be written as a sum of positive squares in only one way, i.e., 406586896 + 258244900 = 20164^2 + 16070^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83103971 + ... + 83103978.

It is an arithmetic number, because the mean of its divisors is an integer number (193909275).

Almost surely, 2^664831796 is an apocalyptic number.

It is an amenable number.

664831796 is a deficient number, since it is larger than the sum of its proper divisors (498623854).

664831796 is a wasteful number, since it uses less digits than its factorization.

664831796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166207953 (or 166207951 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The square root of 664831796 is about 25784.3323745254. The cubic root of 664831796 is about 872.7782747432.

The spelling of 664831796 in words is "six hundred sixty-four million, eight hundred thirty-one thousand, seven hundred ninety-six".