866827577265823 has 2 divisors, whose sum is σ = 866827577265824. Its totient is φ = 866827577265822.

The previous prime is 866827577265809. The next prime is 866827577265863. The reversal of 866827577265823 is 328562775728668.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866827577265823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866827577265863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433413788632911 + 433413788632912.

It is an arithmetic number, because the mean of its divisors is an integer number (433413788632912).

Almost surely, 2^{866827577265823} is an apocalyptic number.

866827577265823 is a deficient number, since it is larger than the sum of its proper divisors (1).

866827577265823 is an equidigital number, since it uses as much as digits as its factorization.

866827577265823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22759833600, while the sum is 82.

The spelling of 866827577265823 in words is "eight hundred sixty-six trillion, eight hundred twenty-seven billion, five hundred seventy-seven million, two hundred sixty-five thousand, eight hundred twenty-three".