3686686866862 has 16 divisors (see below), whose sum is σ = 5710238381952. Its totient is φ = 1783311989760.

The previous prime is 3686686866823. The next prime is 3686686866887. The reversal of 3686686866862 is 2686686866863.

It is a super-2 number, since 2×3686686866862² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9283143 + ... + 9672130.

It is an arithmetic number, because the mean of its divisors is an integer number (356889898872).

Almost surely, 2^{3686686866862} is an apocalyptic number.

3686686866862 is a deficient number, since it is larger than the sum of its proper divisors (2023551515090).

3686686866862 is a wasteful number, since it uses less digits than its factorization.

3686686866862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18958443.

The product of its digits is 6879707136, while the sum is 79.

Subtracting from 3686686866862 its reverse (2686686866863), we obtain a palindrome (999999999999).

The spelling of 3686686866862 in words is "three trillion, six hundred eighty-six billion, six hundred eighty-six million, eight hundred sixty-six thousand, eight hundred sixty-two".