66930173892 has 36 divisors (see below), whose sum is σ = 169493951536. Its totient is φ = 22269265200.

The previous prime is 66930173759. The next prime is 66930173897. The reversal of 66930173892 is 29837103966.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 1679734 + ... + 1719117.

Almost surely, 2^66930173892 is an apocalyptic number.

It is an amenable number.

66930173892 is an abundant number, since it is smaller than the sum of its proper divisors (102563777644).

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

66930173892 is a wasteful number, since it uses less digits than its factorization.

66930173892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399408 (or 3399403 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 66930173892 in words is "sixty-six billion, nine hundred thirty million, one hundred seventy-three thousand, eight hundred ninety-two".