869599665 has 64 divisors (see below), whose sum is σ = 1704165120. Its totient is φ = 417208320.

The previous prime is 869599649. The next prime is 869599667. The reversal of 869599665 is 566995968.

869599665 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 869599665 - 2⁴ = 869599649 is a prime.

It is a super-3 number, since 3×869599665³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 63 ways as a sum of consecutive naturals, for example, 141027 + ... + 147063.

It is an arithmetic number, because the mean of its divisors is an integer number (26627580).

Almost surely, 2^869599665 is an apocalyptic number.

It is an amenable number.

869599665 is a deficient number, since it is larger than the sum of its proper divisors (834565455).

869599665 is a wasteful number, since it uses less digits than its factorization.

869599665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6159 (or 6153 counting only the distinct ones).

The product of its digits is 31492800, while the sum is 63.

The square root of 869599665 is about 29488.9753128182. The cubic root of 869599665 is about 954.4938209176.

The spelling of 869599665 in words is "eight hundred sixty-nine million, five hundred ninety-nine thousand, six hundred sixty-five".