668342356 has 12 divisors (see below), whose sum is σ = 1275926400. Its totient is φ = 303791960.

The previous prime is 668342321. The next prime is 668342387. The reversal of 668342356 is 653243866.

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, 7594756 + ... + 7594843.

It is an arithmetic number, because the mean of its divisors is an integer number (106327200).

Almost surely, 2^668342356 is an apocalyptic number.

It is an amenable number.

668342356 is a deficient number, since it is larger than the sum of its proper divisors (607584044).

668342356 is a wasteful number, since it uses less digits than its factorization.

668342356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15189614 (or 15189612 counting only the distinct ones).

The product of its digits is 622080, while the sum is 43.

The square root of 668342356 is about 25852.3181939261. The cubic root of 668342356 is about 874.3117770852.

The spelling of 668342356 in words is "six hundred sixty-eight million, three hundred forty-two thousand, three hundred fifty-six".