6668888999 has 8 divisors (see below), whose sum is σ = 6753282048. Its totient is φ = 6584994360.

The previous prime is 6668888881. The next prime is 6668889023. The reversal of 6668888999 is 9998888666.

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 6668888999 - 2³² = 2373921703 is a prime.

6668888999 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668888599) 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, 97637 + ... + 151230.

It is an arithmetic number, because the mean of its divisors is an integer number (844160256).

Almost surely, 2^6668888999 is an apocalyptic number.

6668888999 is a deficient number, since it is larger than the sum of its proper divisors (84393049).

6668888999 is a wasteful number, since it uses less digits than its factorization.

6668888999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249205.

The product of its digits is 644972544, while the sum is 77.

The square root of 6668888999 is about 81663.2659094651. The cubic root of 6668888999 is about 1882.2811640080.

The spelling of 6668888999 in words is "six billion, six hundred sixty-eight million, eight hundred eighty-eight thousand, nine hundred ninety-nine".