6628081255 has 4 divisors (see below), whose sum is σ = 7953697512. Its totient is φ = 5302465000.

The previous prime is 6628081249. The next prime is 6628081297. The reversal of 6628081255 is 5521808266.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6628081255 - 2⁹ = 6628080743 is a prime.

It is a super-2 number, since 2×6628081255² = 87862922245764750050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662808121 + ... + 662808130.

It is an arithmetic number, because the mean of its divisors is an integer number (1988424378).

Almost surely, 2^6628081255 is an apocalyptic number.

6628081255 is a deficient number, since it is larger than the sum of its proper divisors (1325616257).

6628081255 is a wasteful number, since it uses less digits than its factorization.

6628081255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325616256.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 6628081255 is about 81413.0287791825. The cubic root of 6628081255 is about 1878.4340036609.

The spelling of 6628081255 in words is "six billion, six hundred twenty-eight million, eighty-one thousand, two hundred fifty-five".