2166056 has 16 divisors (see below), whose sum is σ = 4118100. Its totient is φ = 1067904.

The previous prime is 2166053. The next prime is 2166077. The reversal of 2166056 is 6506612.

It can be written as a sum of positive squares in 2 ways, for example, as 2149156 + 16900 = 1466^2 + 130^2 .

It is not an unprimeable number, because it can be changed into a prime (2166053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271 + ... + 2438.

2^2166056 is an apocalyptic number.

It is an amenable number.

2166056 is a deficient number, since it is larger than the sum of its proper divisors (1952044).

2166056 is a wasteful number, since it uses less digits than its factorization.

2166056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3788 (or 3784 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2166056 is about 1471.7526966172. The cubic root of 2166056 is about 129.3867766046.

The spelling of 2166056 in words is "two million, one hundred sixty-six thousand, fifty-six".