668428316 has 12 divisors (see below), whose sum is σ = 1169985432. Its totient is φ = 334146768.

The previous prime is 668428297. The next prime is 668428339. The reversal of 668428316 is 613824866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10346 + ... + 37998.

It is an arithmetic number, because the mean of its divisors is an integer number (97498786).

Almost surely, 2^668428316 is an apocalyptic number.

It is an amenable number.

668428316 is a deficient number, since it is larger than the sum of its proper divisors (501557116).

668428316 is a wasteful number, since it uses less digits than its factorization.

668428316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33700 (or 33698 counting only the distinct ones).

The product of its digits is 331776, while the sum is 44.

The square root of 668428316 is about 25853.9806606256. The cubic root of 668428316 is about 874.3492591820.

The spelling of 668428316 in words is "six hundred sixty-eight million, four hundred twenty-eight thousand, three hundred sixteen".