668885007042 has 24 divisors (see below), whose sum is σ = 1656286684416. Its totient is φ = 191110001976.

The previous prime is 668885007023. The next prime is 668885007073. The reversal of 668885007042 is 240700588866.

668885007042 is a `hidden beast` number, since 6 + 68 + 8 + 8 + 500 + 70 + 4 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 668885007042.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2654305458 + ... + 2654305709.

It is an arithmetic number, because the mean of its divisors is an integer number (69011945184).

Almost surely, 2^668885007042 is an apocalyptic number.

668885007042 is an abundant number, since it is smaller than the sum of its proper divisors (987401677374).

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

668885007042 is a wasteful number, since it uses less digits than its factorization.

668885007042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308611182 (or 5308611179 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 668885007042 in words is "six hundred sixty-eight billion, eight hundred eighty-five million, seven thousand, forty-two".