6668518827 has 6 divisors (see below), whose sum is σ = 8891547028. Its totient is φ = 4445584924.

The previous prime is 6668518811. The next prime is 6668518853. The reversal of 6668518827 is 7288158666.

It is a happy number.

It is not a de Polignac number, because 6668518827 - 2⁴ = 6668518811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6668518897) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117868 + ... + 165014.

Almost surely, 2^6668518827 is an apocalyptic number.

6668518827 is a deficient number, since it is larger than the sum of its proper divisors (2223028201).

6668518827 is an frugal number, since it uses more digits than its factorization.

6668518827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94297 (or 47150 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 57.

The square root of 6668518827 is about 81660.9994244499. Note that the first 3 decimals coincide. The cubic root of 6668518827 is about 1882.2463365839.

The spelling of 6668518827 in words is "six billion, six hundred sixty-eight million, five hundred eighteen thousand, eight hundred twenty-seven".