6681245580 has 96 divisors (see below), whose sum is σ = 20802862080. Its totient is φ = 1780228800.

The previous prime is 6681245573. The next prime is 6681245611. The reversal of 6681245580 is 855421866.

6681245580 is a `hidden beast` number, since 6 + 68 + 1 + 2 + 4 + 5 + 580 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 779277 + ... + 787803.

It is an arithmetic number, because the mean of its divisors is an integer number (216696480).

Almost surely, 2^6681245580 is an apocalyptic number.

6681245580 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 6681245580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10401431040).

6681245580 is an abundant number, since it is smaller than the sum of its proper divisors (14121616500).

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

6681245580 is a wasteful number, since it uses less digits than its factorization.

6681245580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9996 (or 9988 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The square root of 6681245580 is about 81738.8865840488. The cubic root of 6681245580 is about 1883.4429871850.

The spelling of 6681245580 in words is "six billion, six hundred eighty-one million, two hundred forty-five thousand, five hundred eighty".