2166365317 has 2 divisors, whose sum is σ = 2166365318. Its totient is φ = 2166365316.

The previous prime is 2166365303. The next prime is 2166365323. The reversal of 2166365317 is 7135636612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1440278401 + 726086916 = 37951^2 + 26946^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166365317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2166365317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166365387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083182658 + 1083182659.

It is an arithmetic number, because the mean of its divisors is an integer number (1083182659).

Almost surely, 2^2166365317 is an apocalyptic number.

It is an amenable number.

2166365317 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166365317 is an equidigital number, since it uses as much as digits as its factorization.

2166365317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 40.

The square root of 2166365317 is about 46544.2296853219. The cubic root of 2166365317 is about 1293.9293520574.

The spelling of 2166365317 in words is "two billion, one hundred sixty-six million, three hundred sixty-five thousand, three hundred seventeen".