2166261112 has 16 divisors (see below), whose sum is σ = 4064603400. Its totient is φ = 1082366880.

The previous prime is 2166261077. The next prime is 2166261113. The reversal of 2166261112 is 2111626612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166261113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83314 + ... + 106177.

Almost surely, 2^2166261112 is an apocalyptic number.

It is an amenable number.

2166261112 is a deficient number, since it is larger than the sum of its proper divisors (1898342288).

2166261112 is a wasteful number, since it uses less digits than its factorization.

2166261112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190926 (or 190922 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 2166261112 is about 46543.1102527538. The cubic root of 2166261112 is about 1293.9086051611.

Adding to 2166261112 its reverse (2111626612), we get a palindrome (4277887724).

The spelling of 2166261112 in words is "two billion, one hundred sixty-six million, two hundred sixty-one thousand, one hundred twelve".