6686251131 has 16 divisors (see below), whose sum is σ = 10340643584. Its totient is φ = 3763688544.

The previous prime is 6686251127. The next prime is 6686251141. The reversal of 6686251131 is 1311526866.

It is not a de Polignac number, because 6686251131 - 2² = 6686251127 is a prime.

It is a super-2 number, since 2×6686251131² = 89411908373597558322, which contains 22 as substring.

It is the 81770-th Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6686251131.

It is not an unprimeable number, because it can be changed into a prime (6686251111) by changing a digit.

It is a nontrivial repunit in base 81769.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2374660 + ... + 2377473.

It is an arithmetic number, because the mean of its divisors is an integer number (646290224).

Almost surely, 2^6686251131 is an apocalyptic number.

6686251131 is a deficient number, since it is larger than the sum of its proper divisors (3654392453).

6686251131 is a wasteful number, since it uses less digits than its factorization.

6686251131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4752210.

The product of its digits is 51840, while the sum is 39.

The square root of 6686251131 is about 81769.5000045861. The cubic root of 6686251131 is about 1883.9132246783.

Adding to 6686251131 its reverse (1311526866), we get a palindrome (7997777997).

The spelling of 6686251131 in words is "six billion, six hundred eighty-six million, two hundred fifty-one thousand, one hundred thirty-one".