6685807864 has 16 divisors (see below), whose sum is σ = 12542923800. Its totient is φ = 3341028192.

The previous prime is 6685807861. The next prime is 6685807927. The reversal of 6685807864 is 4687085866.

It is a junction number, because it is equal to n+sod(n) for n = 6685807799 and 6685807808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6685807861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219262 + ... + 247885.

Almost surely, 2^6685807864 is an apocalyptic number.

It is an amenable number.

6685807864 is a deficient number, since it is larger than the sum of its proper divisors (5857115936).

6685807864 is a wasteful number, since it uses less digits than its factorization.

6685807864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468942 (or 468938 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 58.

The square root of 6685807864 is about 81766.7894930454. The cubic root of 6685807864 is about 1883.8715922298.

The spelling of 6685807864 in words is "six billion, six hundred eighty-five million, eight hundred seven thousand, eight hundred sixty-four".