6666626256 has 80 divisors (see below), whose sum is σ = 18297638400. Its totient is φ = 2087576064.

The previous prime is 6666626233. The next prime is 6666626261. The reversal of 6666626256 is 6526266666.

It is a junction number, because it is equal to n+sod(n) for n = 6666626199 and 6666626208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13216 + ... + 116223.

It is an arithmetic number, because the mean of its divisors is an integer number (228720480).

Almost surely, 2^6666626256 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 6666626256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9148819200).

6666626256 is an abundant number, since it is smaller than the sum of its proper divisors (11631012144).

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

6666626256 is a wasteful number, since it uses less digits than its factorization.

6666626256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129516 (or 129510 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 51.

The square root of 6666626256 is about 81649.4106286138. The cubic root of 6666626256 is about 1882.0682549650.

The spelling of 6666626256 in words is "six billion, six hundred sixty-six million, six hundred twenty-six thousand, two hundred fifty-six".