866827373112187 has 2 divisors, whose sum is σ = 866827373112188. Its totient is φ = 866827373112186.

The previous prime is 866827373112149. The next prime is 866827373112209. The reversal of 866827373112187 is 781211373728668.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866827373112187 - 2³⁹ = 866277617298299 is a prime.

It is not a weakly prime, because it can be changed into another prime (866827373512187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433413686556093 + 433413686556094.

It is an arithmetic number, because the mean of its divisors is an integer number (433413686556094).

Almost surely, 2^{866827373112187} is an apocalyptic number.

866827373112187 is a deficient number, since it is larger than the sum of its proper divisors (1).

866827373112187 is an equidigital number, since it uses as much as digits as its factorization.

866827373112187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 227598336, while the sum is 70.

The spelling of 866827373112187 in words is "eight hundred sixty-six trillion, eight hundred twenty-seven billion, three hundred seventy-three million, one hundred twelve thousand, one hundred eighty-seven".