6686868680 has 16 divisors (see below), whose sum is σ = 15045454620. Its totient is φ = 2674747456.

The previous prime is 6686868673. The next prime is 6686868709. The reversal of 6686868680 is 868686866.

It can be written as a sum of positive squares in 2 ways, for example, as 5363218756 + 1323649924 = 73234^2 + 36382^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83585819 + ... + 83585898.

Almost surely, 2^6686868680 is an apocalyptic number.

It is an amenable number.

6686868680 is an abundant number, since it is smaller than the sum of its proper divisors (8358585940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6686868680 is a wasteful number, since it uses less digits than its factorization.

6686868680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167171728 (or 167171724 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 62.

The square root of 6686868680 is about 81773.2760747666. The cubic root of 6686868680 is about 1883.9712229442.

It can be divided in two parts, 6 and 686868680, that added together give a palindrome (686868686).

The spelling of 6686868680 in words is "six billion, six hundred eighty-six million, eight hundred sixty-eight thousand, six hundred eighty".