668081003 has 2 divisors, whose sum is σ = 668081004. Its totient is φ = 668081002.

The previous prime is 668080999. The next prime is 668081039. The reversal of 668081003 is 300180866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668081003 - 2² = 668080999 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (668081303) 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, 334040501 + 334040502.

It is an arithmetic number, because the mean of its divisors is an integer number (334040502).

Almost surely, 2^668081003 is an apocalyptic number.

668081003 is a deficient number, since it is larger than the sum of its proper divisors (1).

668081003 is an equidigital number, since it uses as much as digits as its factorization.

668081003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 668081003 is about 25847.2629692198. The cubic root of 668081003 is about 874.1977966801.

The spelling of 668081003 in words is "six hundred sixty-eight million, eighty-one thousand, three".