66916888913900 has 18 divisors (see below), whose sum is σ = 145209648943380. Its totient is φ = 26766755565520.

The previous prime is 66916888913867. The next prime is 66916888913909. The reversal of 66916888913900 is 931988861966.

It is a super-2 number, since 2×66916888913900² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66916888913909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 334584444470 + ... + 334584444669.

Almost surely, 2^{66916888913900} is an apocalyptic number.

It is an amenable number.

66916888913900 is an abundant number, since it is smaller than the sum of its proper divisors (78292760029480).

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

66916888913900 is a wasteful number, since it uses less digits than its factorization.

66916888913900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669168889153 (or 669168889146 counting only the distinct ones).

The product of its (nonzero) digits is 241864704, while the sum is 74.

The spelling of 66916888913900 in words is "sixty-six trillion, nine hundred sixteen billion, eight hundred eighty-eight million, nine hundred thirteen thousand, nine hundred".