166266117 has 12 divisors (see below), whose sum is σ = 241997184. Its totient is φ = 109997160.

The previous prime is 166266109. The next prime is 166266157. The reversal of 166266117 is 711662661.

166266117 is a `hidden beast` number, since 16 + 6 + 26 + 611 + 7 = 666.

It is not a de Polignac number, because 166266117 - 2³ = 166266109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166266157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69333 + ... + 71690.

It is an arithmetic number, because the mean of its divisors is an integer number (20166432).

Almost surely, 2^166266117 is an apocalyptic number.

It is an amenable number.

166266117 is a deficient number, since it is larger than the sum of its proper divisors (75731067).

166266117 is a wasteful number, since it uses less digits than its factorization.

166266117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141160 (or 141157 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 166266117 is about 12894.4219335339. The cubic root of 166266117 is about 549.8799925496.

The spelling of 166266117 in words is "one hundred sixty-six million, two hundred sixty-six thousand, one hundred seventeen".