66415165188 has 24 divisors (see below), whose sum is σ = 154972917792. Its totient is φ = 22137788544.

The previous prime is 66415165183. The next prime is 66415165189. The reversal of 66415165188 is 88156151466.

It is a self number, because there is not a number n which added to its sum of digits gives 66415165188.

It is not an unprimeable number, because it can be changed into a prime (66415165183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745231 + ... + 829577.

It is an arithmetic number, because the mean of its divisors is an integer number (6457204908).

Almost surely, 2^66415165188 is an apocalyptic number.

It is an amenable number.

66415165188 is an abundant number, since it is smaller than the sum of its proper divisors (88557752604).

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

66415165188 is a wasteful number, since it uses less digits than its factorization.

66415165188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149971 (or 149969 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 51.

The spelling of 66415165188 in words is "sixty-six billion, four hundred fifteen million, one hundred sixty-five thousand, one hundred eighty-eight".