869666835123 has 12 divisors (see below), whose sum is σ = 1256215988248. Its totient is φ = 579763785600.

The previous prime is 869666835119. The next prime is 869666835127. The reversal of 869666835123 is 321538666968.

It is an interprime number because it is at equal distance from previous prime (869666835119) and next prime (869666835127).

It is not a de Polignac number, because 869666835123 - 2² = 869666835119 is a prime.

It is a super-2 number, since 2×869666835123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869666835127) 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, 777790 + ... + 1531107.

Almost surely, 2^869666835123 is an apocalyptic number.

869666835123 is a deficient number, since it is larger than the sum of its proper divisors (386549153125).

869666835123 is a wasteful number, since it uses less digits than its factorization.

869666835123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350754 (or 2350751 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 63.

The spelling of 869666835123 in words is "eight hundred sixty-nine billion, six hundred sixty-six million, eight hundred thirty-five thousand, one hundred twenty-three".