6681122720 has 96 divisors (see below), whose sum is σ = 16066149120. Its totient is φ = 2624993280.

The previous prime is 6681122713. The next prime is 6681122743. The reversal of 6681122720 is 272211866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3554741 + ... + 3556619.

It is an arithmetic number, because the mean of its divisors is an integer number (167355720).

Almost surely, 2^6681122720 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 6681122720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8033074560).

6681122720 is an abundant number, since it is smaller than the sum of its proper divisors (9385026400).

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

6681122720 is a wasteful number, since it uses less digits than its factorization.

6681122720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278 (or 2270 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 6681122720 is about 81738.1350411177. The cubic root of 6681122720 is about 1883.4314423704.

The spelling of 6681122720 in words is "six billion, six hundred eighty-one million, one hundred twenty-two thousand, seven hundred twenty".