66905020676 has 24 divisors (see below), whose sum is σ = 126997368960. Its totient is φ = 30657084192.

The previous prime is 66905020613. The next prime is 66905020703. The reversal of 66905020676 is 67602050966.

66905020676 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 66905020676.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4620956 + ... + 4635411.

It is an arithmetic number, because the mean of its divisors is an integer number (5291557040).

Almost surely, 2^66905020676 is an apocalyptic number.

It is an amenable number.

66905020676 is a deficient number, since it is larger than the sum of its proper divisors (60092348284).

66905020676 is a wasteful number, since it uses less digits than its factorization.

66905020676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9256523 (or 9256521 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 66905020676 in words is "sixty-six billion, nine hundred five million, twenty thousand, six hundred seventy-six".