6656000000 has 224 divisors, whose sum is σ = 17919497190. Its totient is φ = 2457600000.

The previous prime is 6655999997. The next prime is 6656000017. The reversal of 6656000000 is 6566.

It is a happy number.

It can be written as a sum of positive squares in 7 ways, for example, as 4795285504 + 1860714496 = 69248^2 + 43136^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6656000000.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 511999994 + ... + 512000006.

Almost surely, 2^6656000000 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 6656000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8959748595).

6656000000 is an abundant number, since it is smaller than the sum of its proper divisors (11263497190).

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

6656000000 is an frugal number, since it uses more digits than its factorization.

6656000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 20 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 6656000000 is about 81584.3122174846. The cubic root of 6656000000 is about 1881.0677501766.

Adding to 6656000000 its reverse (6566), we get a palindrome (6656006566).

The spelling of 6656000000 in words is "six billion, six hundred fifty-six million", and thus it is an aban number.