6669886999 has 2 divisors, whose sum is σ = 6669887000. Its totient is φ = 6669886998.

The previous prime is 6669886957. The next prime is 6669887027. The reversal of 6669886999 is 9996889666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6669886999 - 2¹⁵ = 6669854231 is a prime.

6669886999 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6669880999) 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 as a sum of consecutive naturals, namely, 3334943499 + 3334943500.

It is an arithmetic number, because the mean of its divisors is an integer number (3334943500).

Almost surely, 2^6669886999 is an apocalyptic number.

6669886999 is a deficient number, since it is larger than the sum of its proper divisors (1).

6669886999 is an equidigital number, since it uses as much as digits as its factorization.

6669886999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544195584, while the sum is 76.

The square root of 6669886999 is about 81669.3761394074. The cubic root of 6669886999 is about 1882.3750538550.

The spelling of 6669886999 in words is "six billion, six hundred sixty-nine million, eight hundred eighty-six thousand, nine hundred ninety-nine".