6628895081 has 8 divisors (see below), whose sum is σ = 6869379720. Its totient is φ = 6389203968.

The previous prime is 6628895057. The next prime is 6628895083. The reversal of 6628895081 is 1805988266.

It can be written as a sum of positive squares in 4 ways, for example, as 4489000000 + 2139895081 = 67000^2 + 46259^2 .

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 6628895081 - 2¹⁰ = 6628894057 is a prime.

It is a super-2 number, since 2×6628895081² = 87884499989811993122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6628895083) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 181346 + ... + 214811.

It is an arithmetic number, because the mean of its divisors is an integer number (858672465).

Almost surely, 2^6628895081 is an apocalyptic number.

It is an amenable number.

6628895081 is a deficient number, since it is larger than the sum of its proper divisors (240484639).

6628895081 is a wasteful number, since it uses less digits than its factorization.

6628895081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396763.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The square root of 6628895081 is about 81418.0267569781. The cubic root of 6628895081 is about 1878.5108814082.

The spelling of 6628895081 in words is "six billion, six hundred twenty-eight million, eight hundred ninety-five thousand, eighty-one".