6686197831 has 16 divisors (see below), whose sum is σ = 7275443200. Its totient is φ = 6121267200.

The previous prime is 6686197811. The next prime is 6686197849. The reversal of 6686197831 is 1387916866.

It is a cyclic number.

It is not a de Polignac number, because 6686197831 - 2¹³ = 6686189639 is a prime.

It is a super-2 number, since 2×6686197831² = 89410482870538209122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686197811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427591 + ... + 442951.

It is an arithmetic number, because the mean of its divisors is an integer number (454715200).

Almost surely, 2^6686197831 is an apocalyptic number.

6686197831 is a deficient number, since it is larger than the sum of its proper divisors (589245369).

6686197831 is a wasteful number, since it uses less digits than its factorization.

6686197831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16150.

The product of its digits is 2612736, while the sum is 55.

The square root of 6686197831 is about 81769.1740877942. The cubic root of 6686197831 is about 1883.9082187420.

The spelling of 6686197831 in words is "six billion, six hundred eighty-six million, one hundred ninety-seven thousand, eight hundred thirty-one".