668007763 has 2 divisors, whose sum is σ = 668007764. Its totient is φ = 668007762.

The previous prime is 668007751. The next prime is 668007787. The reversal of 668007763 is 367700866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668007763 - 2²⁵ = 634453331 is a prime.

It is not a weakly prime, because it can be changed into another prime (668007713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334003881 + 334003882.

It is an arithmetic number, because the mean of its divisors is an integer number (334003882).

Almost surely, 2^668007763 is an apocalyptic number.

668007763 is a deficient number, since it is larger than the sum of its proper divisors (1).

668007763 is an equidigital number, since it uses as much as digits as its factorization.

668007763 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 668007763 is about 25845.8461459477. The cubic root of 668007763 is about 874.1658501615.

The spelling of 668007763 in words is "six hundred sixty-eight million, seven thousand, seven hundred sixty-three".