2166412279 has 8 divisors (see below), whose sum is σ = 2221616160. Its totient is φ = 2111894400.

The previous prime is 2166412247. The next prime is 2166412309. The reversal of 2166412279 is 9722146612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2166412279 - 2⁵ = 2166412247 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 (2166412229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165102 + ... + 177739.

It is an arithmetic number, because the mean of its divisors is an integer number (277702020).

Almost surely, 2^2166412279 is an apocalyptic number.

2166412279 is a deficient number, since it is larger than the sum of its proper divisors (55203881).

2166412279 is an equidigital number, since it uses as much as digits as its factorization.

2166412279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343001.

The product of its digits is 72576, while the sum is 40.

The square root of 2166412279 is about 46544.7341704730. The cubic root of 2166412279 is about 1293.9387018303.

The spelling of 2166412279 in words is "two billion, one hundred sixty-six million, four hundred twelve thousand, two hundred seventy-nine".