2166571279 has 2 divisors, whose sum is σ = 2166571280. Its totient is φ = 2166571278.

The previous prime is 2166571249. The next prime is 2166571283. The reversal of 2166571279 is 9721756612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2166571279 - 2⁵ = 2166571247 is a prime.

It is a super-2 number, since 2×2166571279² = 9388062213975391682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166571219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083285639 + 1083285640.

It is an arithmetic number, because the mean of its divisors is an integer number (1083285640).

Almost surely, 2^2166571279 is an apocalyptic number.

2166571279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166571279 is an equidigital number, since it uses as much as digits as its factorization.

2166571279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 46.

The square root of 2166571279 is about 46546.4421733821. The cubic root of 2166571279 is about 1293.9703565039.

The spelling of 2166571279 in words is "two billion, one hundred sixty-six million, five hundred seventy-one thousand, two hundred seventy-nine".