2166571267 has 16 divisors (see below), whose sum is σ = 2542804992. Its totient is φ = 1807457760.

The previous prime is 2166571249. The next prime is 2166571279. The reversal of 2166571267 is 7621756612.

It is a cyclic number.

It is not a de Polignac number, because 2166571267 - 2¹⁹ = 2166046979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2166571217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41358 + ... + 77740.

It is an arithmetic number, because the mean of its divisors is an integer number (158925312).

Almost surely, 2^2166571267 is an apocalyptic number.

2166571267 is a deficient number, since it is larger than the sum of its proper divisors (376233725).

2166571267 is a wasteful number, since it uses less digits than its factorization.

2166571267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36618.

The product of its digits is 211680, while the sum is 43.

The square root of 2166571267 is about 46546.4420444785. The cubic root of 2166571267 is about 1293.9703541149.

The spelling of 2166571267 in words is "two billion, one hundred sixty-six million, five hundred seventy-one thousand, two hundred sixty-seven".