866159059 has 2 divisors, whose sum is σ = 866159060. Its totient is φ = 866159058.

The previous prime is 866159051. The next prime is 866159087. The reversal of 866159059 is 950951668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866159059 - 2³ = 866159051 is a prime.

It is not a weakly prime, because it can be changed into another prime (866159051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433079529 + 433079530.

It is an arithmetic number, because the mean of its divisors is an integer number (433079530).

Almost surely, 2^866159059 is an apocalyptic number.

866159059 is a deficient number, since it is larger than the sum of its proper divisors (1).

866159059 is an equidigital number, since it uses as much as digits as its factorization.

866159059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 49.

The square root of 866159059 is about 29430.5803374653. The cubic root of 866159059 is about 953.2333260077.

The spelling of 866159059 in words is "eight hundred sixty-six million, one hundred fifty-nine thousand, fifty-nine".