668346938 has 16 divisors (see below), whose sum is σ = 1146148224. Its totient is φ = 286331760.

The previous prime is 668346937. The next prime is 668346941. The reversal of 668346938 is 839643866.

It is a super-3 number, since 3×668346938³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 668346938.

It is not an unprimeable number, because it can be changed into a prime (668346937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42356 + ... + 55952.

It is an arithmetic number, because the mean of its divisors is an integer number (71634264).

Almost surely, 2^668346938 is an apocalyptic number.

668346938 is a deficient number, since it is larger than the sum of its proper divisors (477801286).

668346938 is a wasteful number, since it uses less digits than its factorization.

668346938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17117.

The product of its digits is 4478976, while the sum is 53.

The square root of 668346938 is about 25852.4068125194. The cubic root of 668346938 is about 874.3137751069.

The spelling of 668346938 in words is "six hundred sixty-eight million, three hundred forty-six thousand, nine hundred thirty-eight".