668000899 has 2 divisors, whose sum is σ = 668000900. Its totient is φ = 668000898.

The previous prime is 668000867. The next prime is 668000947. The reversal of 668000899 is 998000866.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668000899 - 2⁵ = 668000867 is a prime.

It is a Chen prime.

668000899 is a strobogrammatic number because it is the same when read upside-down.

It is not a weakly prime, because it can be changed into another prime (668000299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334000449 + 334000450.

It is an arithmetic number, because the mean of its divisors is an integer number (334000450).

Almost surely, 2^668000899 is an apocalyptic number.

668000899 is a deficient number, since it is larger than the sum of its proper divisors (1).

668000899 is an equidigital number, since it uses as much as digits as its factorization.

668000899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 668000899 is about 25845.7133583115. The cubic root of 668000899 is about 874.1628560372.

The spelling of 668000899 in words is "six hundred sixty-eight million, eight hundred ninety-nine", and thus it is an aban number.