668311351942 has 8 divisors (see below), whose sum is σ = 1079579876256. Its totient is φ = 308451393192.

The previous prime is 668311351937. The next prime is 668311351999. The reversal of 668311351942 is 249153113866.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 12852141358 + ... + 12852141409.

It is an arithmetic number, because the mean of its divisors is an integer number (134947484532).

Almost surely, 2^668311351942 is an apocalyptic number.

668311351942 is a deficient number, since it is larger than the sum of its proper divisors (411268524314).

668311351942 is a wasteful number, since it uses less digits than its factorization.

668311351942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25704282782.

The product of its digits is 933120, while the sum is 49.

The spelling of 668311351942 in words is "six hundred sixty-eight billion, three hundred eleven million, three hundred fifty-one thousand, nine hundred forty-two".