866788526376827 has 2 divisors, whose sum is σ = 866788526376828. Its totient is φ = 866788526376826.

The previous prime is 866788526376797. The next prime is 866788526376833. The reversal of 866788526376827 is 728673625887668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866788526376827 - 2⁸ = 866788526376571 is a prime.

It is a super-2 number, since 2×866788526376827² (a number of 31 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (866788526376727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433394263188413 + 433394263188414.

It is an arithmetic number, because the mean of its divisors is an integer number (433394263188414).

Almost surely, 2^{866788526376827} is an apocalyptic number.

866788526376827 is a deficient number, since it is larger than the sum of its proper divisors (1).

866788526376827 is an equidigital number, since it uses as much as digits as its factorization.

866788526376827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109247201280, while the sum is 89.

The spelling of 866788526376827 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, three hundred seventy-six thousand, eight hundred twenty-seven".