6686834688 has 136 divisors (see below), whose sum is σ = 19817935200. Its totient is φ = 2228355072.

The previous prime is 6686834681. The next prime is 6686834717. The reversal of 6686834688 is 8864386866.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (6686834681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1767583 + ... + 1771361.

Almost surely, 2^6686834688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6686834688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9908967600).

6686834688 is an abundant number, since it is smaller than the sum of its proper divisors (13131100512).

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

6686834688 is an frugal number, since it uses more digits than its factorization.

6686834688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820 (or 3784 counting only the distinct ones).

The product of its digits is 63700992, while the sum is 63.

The square root of 6686834688 is about 81773.0682315394. The cubic root of 6686834688 is about 1883.9680306150.

The spelling of 6686834688 in words is "six billion, six hundred eighty-six million, eight hundred thirty-four thousand, six hundred eighty-eight".