166116565116 has 18 divisors (see below), whose sum is σ = 419905761912. Its totient is φ = 55372188360.

The previous prime is 166116565091. The next prime is 166116565129. The reversal of 166116565116 is 611565611661.

166116565116 is a `hidden beast` number, since 1 + 6 + 61 + 16 + 565 + 1 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2307174480 + ... + 2307174551.

It is an arithmetic number, because the mean of its divisors is an integer number (23328097884).

Almost surely, 2^166116565116 is an apocalyptic number.

It is an amenable number.

166116565116 is an abundant number, since it is smaller than the sum of its proper divisors (253789196796).

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

166116565116 is a wasteful number, since it uses less digits than its factorization.

166116565116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4614349041 (or 4614349036 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The spelling of 166116565116 in words is "one hundred sixty-six billion, one hundred sixteen million, five hundred sixty-five thousand, one hundred sixteen".