165663113104120 has 16 divisors (see below), whose sum is σ = 372742004484360. Its totient is φ = 66265245241632.

The previous prime is 165663113104081. The next prime is 165663113104157. The reversal of 165663113104120 is 21401311366561.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 4141577827603 = 165663113104120 / (1 + 6 + 5 + 6 + 6 + 3 + 1 + 1 + 3 + 1 + 0 + 4 + 1 + 2 + 0).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2070788913762 + ... + 2070788913841.

Almost surely, 2^{165663113104120} is an apocalyptic number.

165663113104120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165663113104120 is an abundant number, since it is smaller than the sum of its proper divisors (207078891380240).

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

165663113104120 is a wasteful number, since it uses less digits than its factorization.

165663113104120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141577827614 (or 4141577827610 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 165663113104120 in words is "one hundred sixty-five trillion, six hundred sixty-three billion, one hundred thirteen million, one hundred four thousand, one hundred twenty".