2166804007 has 2 divisors, whose sum is σ = 2166804008. Its totient is φ = 2166804006.

The previous prime is 2166803939. The next prime is 2166804047. The reversal of 2166804007 is 7004086612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2166804007 - 2²⁷ = 2032586279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166804047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083402003 + 1083402004.

It is an arithmetic number, because the mean of its divisors is an integer number (1083402004).

Almost surely, 2^2166804007 is an apocalyptic number.

2166804007 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166804007 is an equidigital number, since it uses as much as digits as its factorization.

2166804007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 2166804007 is about 46548.9420610179. The cubic root of 2166804007 is about 1294.0166865976.

The spelling of 2166804007 in words is "two billion, one hundred sixty-six million, eight hundred four thousand, seven".