866008159 has 2 divisors, whose sum is σ = 866008160. Its totient is φ = 866008158.

The previous prime is 866008127. The next prime is 866008183. The reversal of 866008159 is 951800668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866008159 - 2⁵ = 866008127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866408159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433004079 + 433004080.

It is an arithmetic number, because the mean of its divisors is an integer number (433004080).

Almost surely, 2^866008159 is an apocalyptic number.

866008159 is a deficient number, since it is larger than the sum of its proper divisors (1).

866008159 is an equidigital number, since it uses as much as digits as its factorization.

866008159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 866008159 is about 29428.0165658510. The cubic root of 866008159 is about 953.1779661745.

The spelling of 866008159 in words is "eight hundred sixty-six million, eight thousand, one hundred fifty-nine".