866788526243713 has 2 divisors, whose sum is σ = 866788526243714. Its totient is φ = 866788526243712.

The previous prime is 866788526243671. The next prime is 866788526243723. The reversal of 866788526243713 is 317342625887668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 503469588144384 + 363318938099329 = 22438128^2 + 19060927^2 .

It is a cyclic number.

It is not a de Polignac number, because 866788526243713 - 2⁹ = 866788526243201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 866788526243713.

It is not a weakly prime, because it can be changed into another prime (866788526243723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433394263121856 + 433394263121857.

It is an arithmetic number, because the mean of its divisors is an integer number (433394263121857).

Almost surely, 2^{866788526243713} is an apocalyptic number.

It is an amenable number.

866788526243713 is a deficient number, since it is larger than the sum of its proper divisors (1).

866788526243713 is an equidigital number, since it uses as much as digits as its factorization.

866788526243713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3901685760, while the sum is 76.

The spelling of 866788526243713 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, two hundred forty-three thousand, seven hundred thirteen".