668556336 has 80 divisors (see below), whose sum is σ = 1976659200. Its totient is φ = 190742784.

The previous prime is 668556319. The next prime is 668556347. The reversal of 668556336 is 633655866.

668556336 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 412135 + ... + 413753.

It is an arithmetic number, because the mean of its divisors is an integer number (24708240).

Almost surely, 2^668556336 is an apocalyptic number.

It is an amenable number.

668556336 is an abundant number, since it is smaller than the sum of its proper divisors (1308102864).

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

668556336 is a wasteful number, since it uses less digits than its factorization.

668556336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2866 (or 2860 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 48.

The square root of 668556336 is about 25856.4563697348. The cubic root of 668556336 is about 874.4050752130.

The spelling of 668556336 in words is "six hundred sixty-eight million, five hundred fifty-six thousand, three hundred thirty-six".