166355163 has 24 divisors (see below), whose sum is σ = 265093920. Its totient is φ = 99872640.

The previous prime is 166355131. The next prime is 166355173. The reversal of 166355163 is 361553661.

166355163 is a `hidden beast` number, since 1 + 6 + 635 + 5 + 16 + 3 = 666.

It is not a de Polignac number, because 166355163 - 2⁵ = 166355131 is a prime.

It is a super-3 number, since 3×166355163³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (166355173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12543 + ... + 22136.

It is an arithmetic number, because the mean of its divisors is an integer number (11045580).

Almost surely, 2^166355163 is an apocalyptic number.

166355163 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166355163 is a deficient number, since it is larger than the sum of its proper divisors (98738757).

166355163 is a wasteful number, since it uses less digits than its factorization.

166355163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34739 (or 34736 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 166355163 is about 12897.8743597540. The cubic root of 166355163 is about 549.9781401780.

The spelling of 166355163 in words is "one hundred sixty-six million, three hundred fifty-five thousand, one hundred sixty-three".