166055481 has 16 divisors (see below), whose sum is σ = 250043520. Its totient is φ = 108887760.

The previous prime is 166055471. The next prime is 166055489. The reversal of 166055481 is 184550661.

166055481 is a `hidden beast` number, since 1 + 6 + 605 + 5 + 48 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-166055481 is a prime.

It is a super-2 number, since 2×166055481² = 55148845540282722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166055489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48765 + ... + 52058.

It is an arithmetic number, because the mean of its divisors is an integer number (15627720).

Almost surely, 2^166055481 is an apocalyptic number.

It is an amenable number.

166055481 is a deficient number, since it is larger than the sum of its proper divisors (83988039).

166055481 is a wasteful number, since it uses less digits than its factorization.

166055481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100893 (or 100887 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 166055481 is about 12886.2516272188. The cubic root of 166055481 is about 549.6476873154.

The spelling of 166055481 in words is "one hundred sixty-six million, fifty-five thousand, four hundred eighty-one".