6668888888999 has 4 divisors (see below), whose sum is σ = 6668908097400. Its totient is φ = 6668869680600.

The previous prime is 6668888888989. The next prime is 6668888889017. The reversal of 6668888888999 is 9998888888666.

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

It is a cyclic number.

It is not a de Polignac number, because 6668888888999 - 2²⁸ = 6668620453543 is a prime.

6668888888999 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6668888888899 and 6668888888908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668888888989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9073652 + ... + 9781049.

It is an arithmetic number, because the mean of its divisors is an integer number (1667227024350).

Almost surely, 2^{6668888888999} is an apocalyptic number.

6668888888999 is a deficient number, since it is larger than the sum of its proper divisors (19208401).

6668888888999 is a wasteful number, since it uses less digits than its factorization.

6668888888999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19208400.

The product of its digits is 330225942528, while the sum is 101.

The spelling of 6668888888999 in words is "six trillion, six hundred sixty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, nine hundred ninety-nine".