166118318613 has 32 divisors (see below), whose sum is σ = 265238090880. Its totient is φ = 102147194880.

The previous prime is 166118318551. The next prime is 166118318627. The reversal of 166118318613 is 316813811661.

166118318613 is a `hidden beast` number, since 1 + 6 + 6 + 1 + 18 + 3 + 18 + 613 = 666.

It is not a de Polignac number, because 166118318613 - 2⁸ = 166118318357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166118318713) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 269845 + ... + 636437.

It is an arithmetic number, because the mean of its divisors is an integer number (8288690340).

Almost surely, 2^166118318613 is an apocalyptic number.

166118318613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

166118318613 is a deficient number, since it is larger than the sum of its proper divisors (99119772267).

166118318613 is a wasteful number, since it uses less digits than its factorization.

166118318613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367906 (or 367900 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The spelling of 166118318613 in words is "one hundred sixty-six billion, one hundred eighteen million, three hundred eighteen thousand, six hundred thirteen".