668703684 has 48 divisors (see below), whose sum is σ = 1727582976. Its totient is φ = 199610400.

The previous prime is 668703683. The next prime is 668703719. The reversal of 668703684 is 486307866.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (668703683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28962 + ... + 46649.

It is an arithmetic number, because the mean of its divisors is an integer number (35991312).

Almost surely, 2^668703684 is an apocalyptic number.

It is an amenable number.

668703684 is an abundant number, since it is smaller than the sum of its proper divisors (1058879292).

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

668703684 is a wasteful number, since it uses less digits than its factorization.

668703684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75696 (or 75694 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 668703684 is about 25859.3055591213. The cubic root of 668703684 is about 874.4693093285.

The spelling of 668703684 in words is "six hundred sixty-eight million, seven hundred three thousand, six hundred eighty-four".