666568703 has 2 divisors, whose sum is σ = 666568704. Its totient is φ = 666568702.

The previous prime is 666568619. The next prime is 666568709. The reversal of 666568703 is 307865666.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666568703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666568709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333284351 + 333284352.

It is an arithmetic number, because the mean of its divisors is an integer number (333284352).

Almost surely, 2^666568703 is an apocalyptic number.

666568703 is a deficient number, since it is larger than the sum of its proper divisors (1).

666568703 is an equidigital number, since it uses as much as digits as its factorization.

666568703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The square root of 666568703 is about 25817.9918467723. The cubic root of 666568703 is about 873.5376730675.

The spelling of 666568703 in words is "six hundred sixty-six million, five hundred sixty-eight thousand, seven hundred three".