6668008999 has 2 divisors, whose sum is σ = 6668009000. Its totient is φ = 6668008998.

The previous prime is 6668008981. The next prime is 6668009009. The reversal of 6668008999 is 9998008666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6668008999 - 2⁷ = 6668008871 is a prime.

6668008999 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 (6668008969) 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 as a sum of consecutive naturals, namely, 3334004499 + 3334004500.

It is an arithmetic number, because the mean of its divisors is an integer number (3334004500).

Almost surely, 2^6668008999 is an apocalyptic number.

6668008999 is a deficient number, since it is larger than the sum of its proper divisors (1).

6668008999 is an equidigital number, since it uses as much as digits as its factorization.

6668008999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10077696, while the sum is 61.

The square root of 6668008999 is about 81657.8777522414. The cubic root of 6668008999 is about 1882.1983675938.

The spelling of 6668008999 in words is "six billion, six hundred sixty-eight million, eight thousand, nine hundred ninety-nine".