6647068680 has 256 divisors, whose sum is σ = 25401600000. Its totient is φ = 1354641408.

The previous prime is 6647068667. The next prime is 6647068691. The reversal of 6647068680 is 868607466.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 259071 + ... + 283569.

It is an arithmetic number, because the mean of its divisors is an integer number (99225000).

Almost surely, 2^6647068680 is an apocalyptic number.

6647068680 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 6647068680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12700800000).

6647068680 is an abundant number, since it is smaller than the sum of its proper divisors (18754531320).

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

6647068680 is a wasteful number, since it uses less digits than its factorization.

6647068680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24556 (or 24552 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 51.

The square root of 6647068680 is about 81529.5570943446. The cubic root of 6647068680 is about 1880.2260064795.

The spelling of 6647068680 in words is "six billion, six hundred forty-seven million, sixty-eight thousand, six hundred eighty".