866786486563199 has 2 divisors, whose sum is σ = 866786486563200. Its totient is φ = 866786486563198.

The previous prime is 866786486563187. The next prime is 866786486563237. The reversal of 866786486563199 is 991365684687668.

866786486563199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866786486563199 - 2⁸ = 866786486562943 is a prime.

It is a super-2 number, since 2×866786486563199² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866786486568199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433393243281599 + 433393243281600.

It is an arithmetic number, because the mean of its divisors is an integer number (433393243281600).

Almost surely, 2^{866786486563199} is an apocalyptic number.

866786486563199 is a deficient number, since it is larger than the sum of its proper divisors (1).

866786486563199 is an equidigital number, since it uses as much as digits as its factorization.

866786486563199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 135444234240, while the sum is 92.

The spelling of 866786486563199 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, four hundred eighty-six million, five hundred sixty-three thousand, one hundred ninety-nine".