66700680368 has 20 divisors (see below), whose sum is σ = 147694363920. Its totient is φ = 28586005824.

The previous prime is 66700680331. The next prime is 66700680391. The reversal of 66700680368 is 86308600766.

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, 297770783 + ... + 297771006.

It is an arithmetic number, because the mean of its divisors is an integer number (7384718196).

Almost surely, 2^66700680368 is an apocalyptic number.

It is an amenable number.

66700680368 is an abundant number, since it is smaller than the sum of its proper divisors (80993683552).

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

66700680368 is a wasteful number, since it uses less digits than its factorization.

66700680368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595541804 (or 595541798 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 66700680368 in words is "sixty-six billion, seven hundred million, six hundred eighty thousand, three hundred sixty-eight".