6686320320 has 336 divisors, whose sum is σ = 25015899168. Its totient is φ = 1632337920.

The previous prime is 6686320307. The next prime is 6686320327. The reversal of 6686320320 is 230236866.

6686320320 is a `hidden beast` number, since 6 + 6 + 8 + 6 + 320 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (6686320327) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1809675 + ... + 1813365.

Almost surely, 2^6686320320 is an apocalyptic number.

6686320320 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 6686320320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12507949584).

6686320320 is an abundant number, since it is smaller than the sum of its proper divisors (18329578848).

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

6686320320 is a wasteful number, since it uses less digits than its factorization.

6686320320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3768 (or 3755 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 6686320320 is about 81769.9230768869. The cubic root of 6686320320 is about 1883.9197228699.

The spelling of 6686320320 in words is "six billion, six hundred eighty-six million, three hundred twenty thousand, three hundred twenty".