6656712768 has 168 divisors, whose sum is σ = 19640982816. Its totient is φ = 2154240000.

The previous prime is 6656712767. The next prime is 6656712781. The reversal of 6656712768 is 8672176566.

6656712768 is a `hidden beast` number, since 6 + 6 + 567 + 1 + 2 + 76 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (6656712761) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 5927055 + ... + 5928177.

It is an arithmetic number, because the mean of its divisors is an integer number (116910612).

Almost surely, 2^6656712768 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 6656712768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9820491408).

6656712768 is an abundant number, since it is smaller than the sum of its proper divisors (12984270048).

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

6656712768 is a wasteful number, since it uses less digits than its factorization.

6656712768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433 (or 1420 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 6656712768 is about 81588.6803913386. The cubic root of 6656712768 is about 1881.1348934579.

The spelling of 6656712768 in words is "six billion, six hundred fifty-six million, seven hundred twelve thousand, seven hundred sixty-eight".