668142068802 has 32 divisors (see below), whose sum is σ = 1439583669888. Its totient is φ = 205509540096.

The previous prime is 668142068777. The next prime is 668142068813. The reversal of 668142068802 is 208860241866.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1290838 + ... + 1732785.

It is an arithmetic number, because the mean of its divisors is an integer number (44986989684).

Almost surely, 2^668142068802 is an apocalyptic number.

668142068802 is an abundant number, since it is smaller than the sum of its proper divisors (771441601086).

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

668142068802 is a wasteful number, since it uses less digits than its factorization.

668142068802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026474.

The product of its (nonzero) digits is 1769472, while the sum is 51.

The spelling of 668142068802 in words is "six hundred sixty-eight billion, one hundred forty-two million, sixty-eight thousand, eight hundred two".