66366914172 has 48 divisors (see below), whose sum is σ = 167102544000. Its totient is φ = 20379642048.

The previous prime is 66366914167. The next prime is 66366914191. The reversal of 66366914172 is 27141966366.

It is a super-2 number, since 2×66366914172² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348438 + ... + 504125.

It is an arithmetic number, because the mean of its divisors is an integer number (3481303000).

Almost surely, 2^66366914172 is an apocalyptic number.

It is an amenable number.

66366914172 is an abundant number, since it is smaller than the sum of its proper divisors (100735629828).

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

66366914172 is a wasteful number, since it uses less digits than its factorization.

66366914172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853082 (or 853080 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 51.

The spelling of 66366914172 in words is "sixty-six billion, three hundred sixty-six million, nine hundred fourteen thousand, one hundred seventy-two".