2166260949 has 16 divisors (see below), whose sum is σ = 3230535040. Its totient is φ = 1434607200.

The previous prime is 2166260917. The next prime is 2166260959. The reversal of 2166260949 is 9490626612.

2166260949 is a `hidden beast` number, since 2 + 16 + 626 + 0 + 9 + 4 + 9 = 666.

It is not a de Polignac number, because 2166260949 - 2⁵ = 2166260917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166260959) 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 15 ways as a sum of consecutive naturals, for example, 261592 + ... + 269745.

It is an arithmetic number, because the mean of its divisors is an integer number (201908440).

Almost surely, 2^2166260949 is an apocalyptic number.

It is an amenable number.

2166260949 is a deficient number, since it is larger than the sum of its proper divisors (1064274091).

2166260949 is a wasteful number, since it uses less digits than its factorization.

2166260949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531497 (or 531491 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 2166260949 is about 46543.1085016891. The cubic root of 2166260949 is about 1293.9085727077.

The spelling of 2166260949 in words is "two billion, one hundred sixty-six million, two hundred sixty thousand, nine hundred forty-nine".