2165166 has 24 divisors (see below), whose sum is σ = 4819464. Its totient is φ = 702000.

The previous prime is 2165159. The next prime is 2165201. The reversal of 2165166 is 6615612.

It is a happy number.

2165166 is a `hidden beast` number, since 2 + 1 + 651 + 6 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 960 + ... + 2291.

It is an arithmetic number, because the mean of its divisors is an integer number (200811).

2^2165166 is an apocalyptic number.

2165166 is an abundant number, since it is smaller than the sum of its proper divisors (2654298).

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

2165166 is a wasteful number, since it uses less digits than its factorization.

2165166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296 (or 3293 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 2165166 is about 1471.4503049713. The cubic root of 2165166 is about 129.3690531468.

The spelling of 2165166 in words is "two million, one hundred sixty-five thousand, one hundred sixty-six".