869599666 has 16 divisors (see below), whose sum is σ = 1407256704. Its totient is φ = 400634064.

The previous prime is 869599649. The next prime is 869599667. The reversal of 869599666 is 666995968.

869599666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 869599598 and 869599607.

It is not an unprimeable number, because it can be changed into a prime (869599667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15066 + ... + 44341.

It is an arithmetic number, because the mean of its divisors is an integer number (87953544).

Almost surely, 2^869599666 is an apocalyptic number.

869599666 is a deficient number, since it is larger than the sum of its proper divisors (537657038).

869599666 is a wasteful number, since it uses less digits than its factorization.

869599666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59985.

The product of its digits is 37791360, while the sum is 64.

The square root of 869599666 is about 29488.9753297737. The cubic root of 869599666 is about 954.4938212835.

The spelling of 869599666 in words is "eight hundred sixty-nine million, five hundred ninety-nine thousand, six hundred sixty-six".