6666256655 has 8 divisors (see below), whose sum is σ = 8010337200. Its totient is φ = 5325785856.

The previous prime is 6666256621. The next prime is 6666256657. The reversal of 6666256655 is 5566526666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6666256655 - 2¹⁴ = 6666240271 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6666256597 and 6666256606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666256657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 898370 + ... + 905759.

It is an arithmetic number, because the mean of its divisors is an integer number (1001292150).

Almost surely, 2^6666256655 is an apocalyptic number.

6666256655 is a deficient number, since it is larger than the sum of its proper divisors (1344080545).

6666256655 is a wasteful number, since it uses less digits than its factorization.

6666256655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804873.

The product of its digits is 11664000, while the sum is 53.

The square root of 6666256655 is about 81647.1472557370. The cubic root of 6666256655 is about 1882.0334733960.

The spelling of 6666256655 in words is "six billion, six hundred sixty-six million, two hundred fifty-six thousand, six hundred fifty-five".