668940080120 has 64 divisors (see below), whose sum is σ = 1623703173120. Its totient is φ = 246565085184.

The previous prime is 668940080119. The next prime is 668940080131. The reversal of 668940080120 is 21080049866.

It is a happy number.

It is a congruent number.

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, 814712 + ... + 1414791.

It is an arithmetic number, because the mean of its divisors is an integer number (25370362080).

Almost surely, 2^668940080120 is an apocalyptic number.

It is an amenable number.

668940080120 is an abundant number, since it is smaller than the sum of its proper divisors (954763093000).

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

668940080120 is a wasteful number, since it uses less digits than its factorization.

668940080120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230104 (or 2230100 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 668940080120 in words is "six hundred sixty-eight billion, nine hundred forty million, eighty thousand, one hundred twenty".