668304019 has 2 divisors, whose sum is σ = 668304020. Its totient is φ = 668304018.

The previous prime is 668304011. The next prime is 668304037. The reversal of 668304019 is 910403866.

668304019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668304019 - 2³ = 668304011 is a prime.

It is a super-2 number, since 2×668304019² = 893260523623104722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (668304011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334152009 + 334152010.

It is an arithmetic number, because the mean of its divisors is an integer number (334152010).

Almost surely, 2^668304019 is an apocalyptic number.

668304019 is a deficient number, since it is larger than the sum of its proper divisors (1).

668304019 is an equidigital number, since it uses as much as digits as its factorization.

668304019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 668304019 is about 25851.5767217398. The cubic root of 668304019 is about 874.2950595396.

The spelling of 668304019 in words is "six hundred sixty-eight million, three hundred four thousand, nineteen".