2166811607 has 2 divisors, whose sum is σ = 2166811608. Its totient is φ = 2166811606.

The previous prime is 2166811601. The next prime is 2166811613. The reversal of 2166811607 is 7061186612.

It is a balanced prime because it is at equal distance from previous prime (2166811601) and next prime (2166811613).

It is a cyclic number.

It is not a de Polignac number, because 2166811607 - 2²⁶ = 2099702743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166811601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083405803 + 1083405804.

It is an arithmetic number, because the mean of its divisors is an integer number (1083405804).

Almost surely, 2^2166811607 is an apocalyptic number.

2166811607 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166811607 is an equidigital number, since it uses as much as digits as its factorization.

2166811607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 2166811607 is about 46549.0236954547. The cubic root of 2166811607 is about 1294.0181995040.

The spelling of 2166811607 in words is "two billion, one hundred sixty-six million, eight hundred eleven thousand, six hundred seven".