66566895916 has 36 divisors (see below), whose sum is σ = 120786106168. Its totient is φ = 32098840704.

The previous prime is 66566895883. The next prime is 66566895931. The reversal of 66566895916 is 61959866566.

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, 3040240 + ... + 3062056.

Almost surely, 2^66566895916 is an apocalyptic number.

It is an amenable number.

66566895916 is a deficient number, since it is larger than the sum of its proper divisors (54219210252).

66566895916 is a wasteful number, since it uses less digits than its factorization.

66566895916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22786 (or 22755 counting only the distinct ones).

The product of its digits is 125971200, while the sum is 67.

The spelling of 66566895916 in words is "sixty-six billion, five hundred sixty-six million, eight hundred ninety-five thousand, nine hundred sixteen".