668799936 has 112 divisors (see below), whose sum is σ = 2247066880. Its totient is φ = 191082240.

The previous prime is 668799893. The next prime is 668799947. The reversal of 668799936 is 639997866.

668799936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 15550 + ... + 39741.

Almost surely, 2^668799936 is an apocalyptic number.

It is an amenable number.

668799936 is an abundant number, since it is smaller than the sum of its proper divisors (1578266944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668799936 is a wasteful number, since it uses less digits than its factorization.

668799936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55319 (or 55303 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 63.

The square root of 668799936 is about 25861.1665630149. The cubic root of 668799936 is about 874.5112638264.

The spelling of 668799936 in words is "six hundred sixty-eight million, seven hundred ninety-nine thousand, nine hundred thirty-six".