866789959 has 12 divisors (see below), whose sum is σ = 1009093800. Its totient is φ = 742382928.

The previous prime is 866789951. The next prime is 866790007. The reversal of 866789959 is 959987668.

866789959 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 866789959 - 2³ = 866789951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 866789894 and 866789903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866789951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63832 + ... + 76210.

It is an arithmetic number, because the mean of its divisors is an integer number (84091150).

Almost surely, 2^866789959 is an apocalyptic number.

866789959 is a deficient number, since it is larger than the sum of its proper divisors (142303841).

866789959 is a wasteful number, since it uses less digits than its factorization.

866789959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13822 (or 13815 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 67.

The square root of 866789959 is about 29441.2968294537. The cubic root of 866789959 is about 953.4647111257.

The spelling of 866789959 in words is "eight hundred sixty-six million, seven hundred eighty-nine thousand, nine hundred fifty-nine".