866786517712327 has 2 divisors, whose sum is σ = 866786517712328. Its totient is φ = 866786517712326.

The previous prime is 866786517712259. The next prime is 866786517712331. The reversal of 866786517712327 is 723217715687668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866786517712327 - 2¹⁵ = 866786517679559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866786517782327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433393258856163 + 433393258856164.

It is an arithmetic number, because the mean of its divisors is an integer number (433393258856164).

Almost surely, 2^{866786517712327} is an apocalyptic number.

866786517712327 is a deficient number, since it is larger than the sum of its proper divisors (1).

866786517712327 is an equidigital number, since it uses as much as digits as its factorization.

866786517712327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1991485440, while the sum is 76.

The spelling of 866786517712327 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred seventeen million, seven hundred twelve thousand, three hundred twenty-seven".