6666800256 has 384 divisors, whose sum is σ = 21719880000. Its totient is φ = 2027483136.

The previous prime is 6666800221. The next prime is 6666800279. The reversal of 6666800256 is 6520086666.

It is a tau number, because it is divible by the number of its divisors (384).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17138110 + ... + 17138498.

Almost surely, 2^6666800256 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 6666800256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10859940000).

6666800256 is an abundant number, since it is smaller than the sum of its proper divisors (15053079744).

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

6666800256 is a wasteful number, since it uses less digits than its factorization.

6666800256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 6666800256 is about 81650.4761529288. The cubic root of 6666800256 is about 1882.0846289157.

The spelling of 6666800256 in words is "six billion, six hundred sixty-six million, eight hundred thousand, two hundred fifty-six".