66930173896 has 16 divisors (see below), whose sum is σ = 128412543600. Its totient is φ = 32686828944.

The previous prime is 66930173759. The next prime is 66930173897. The reversal of 66930173896 is 69837103966.

It is a self number, because there is not a number n which added to its sum of digits gives 66930173896.

It is not an unprimeable number, because it can be changed into a prime (66930173897) 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, 97281886 + ... + 97282573.

It is an arithmetic number, because the mean of its divisors is an integer number (8025783975).

Almost surely, 2^66930173896 is an apocalyptic number.

It is an amenable number.

66930173896 is a deficient number, since it is larger than the sum of its proper divisors (61482369704).

66930173896 is a wasteful number, since it uses less digits than its factorization.

66930173896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194564508 (or 194564504 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 58.

The spelling of 66930173896 in words is "sixty-six billion, nine hundred thirty million, one hundred seventy-three thousand, eight hundred ninety-six".