668081880016 has 20 divisors (see below), whose sum is σ = 1306505922912. Its totient is φ = 330919061216.

The previous prime is 668081880007. The next prime is 668081880017. The reversal of 668081880016 is 610088180866.

668081880016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668081880017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195115660 + ... + 195119083.

Almost surely, 2^668081880016 is an apocalyptic number.

It is an amenable number.

668081880016 is a deficient number, since it is larger than the sum of its proper divisors (638424042896).

668081880016 is a wasteful number, since it uses less digits than its factorization.

668081880016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390234858 (or 390234852 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 52.

The spelling of 668081880016 in words is "six hundred sixty-eight billion, eighty-one million, eight hundred eighty thousand, sixteen".