668809314 has 24 divisors (see below), whose sum is σ = 1495832832. Its totient is φ = 215744760.

The previous prime is 668809313. The next prime is 668809319. The reversal of 668809314 is 413908866.

It is a self number, because there is not a number n which added to its sum of digits gives 668809314.

It is not an unprimeable number, because it can be changed into a prime (668809313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 598734 + ... + 599849.

It is an arithmetic number, because the mean of its divisors is an integer number (62326368).

Almost surely, 2^668809314 is an apocalyptic number.

668809314 is an abundant number, since it is smaller than the sum of its proper divisors (827023518).

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

668809314 is a wasteful number, since it uses less digits than its factorization.

668809314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198622 (or 1198619 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 668809314 is about 25861.3478767059. The cubic root of 668809314 is about 874.5153513110.

The spelling of 668809314 in words is "six hundred sixty-eight million, eight hundred nine thousand, three hundred fourteen".