6686685180 has 144 divisors (see below), whose sum is σ = 23273961984. Its totient is φ = 1522224000.

The previous prime is 6686685149. The next prime is 6686685199. The reversal of 6686685180 is 815866866.

It is a happy number.

6686685180 is a `hidden beast` number, since 6 + 68 + 6 + 68 + 518 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 305689 + ... + 326831.

It is an arithmetic number, because the mean of its divisors is an integer number (161624736).

Almost surely, 2^6686685180 is an apocalyptic number.

6686685180 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6686685180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11636980992).

6686685180 is an abundant number, since it is smaller than the sum of its proper divisors (16587276804).

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

6686685180 is a wasteful number, since it uses less digits than its factorization.

6686685180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21416 (or 21411 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The square root of 6686685180 is about 81772.1540623702. The cubic root of 6686685180 is about 1883.9539895724.

The spelling of 6686685180 in words is "six billion, six hundred eighty-six million, six hundred eighty-five thousand, one hundred eighty".