669645703 has 2 divisors, whose sum is σ = 669645704. Its totient is φ = 669645702.

The previous prime is 669645689. The next prime is 669645719. The reversal of 669645703 is 307546966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669645703 - 2⁹ = 669645191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669645763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334822851 + 334822852.

It is an arithmetic number, because the mean of its divisors is an integer number (334822852).

Almost surely, 2^669645703 is an apocalyptic number.

669645703 is a deficient number, since it is larger than the sum of its proper divisors (1).

669645703 is an equidigital number, since it uses as much as digits as its factorization.

669645703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 46.

The square root of 669645703 is about 25877.5134624639. The cubic root of 669645703 is about 874.8797453240.

The spelling of 669645703 in words is "six hundred sixty-nine million, six hundred forty-five thousand, seven hundred three".