669059693 has 2 divisors, whose sum is σ = 669059694. Its totient is φ = 669059692.

The previous prime is 669059659. The next prime is 669059737. The reversal of 669059693 is 396950966.

669059693 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 can be written as a sum of positive squares in only one way, i.e., 655206409 + 13853284 = 25597^2 + 3722^2 .

It is a cyclic number.

It is not a de Polignac number, because 669059693 - 2⁸ = 669059437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669059623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334529846 + 334529847.

It is an arithmetic number, because the mean of its divisors is an integer number (334529847).

Almost surely, 2^669059693 is an apocalyptic number.

It is an amenable number.

669059693 is a deficient number, since it is larger than the sum of its proper divisors (1).

669059693 is an equidigital number, since it uses as much as digits as its factorization.

669059693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2361960, while the sum is 53.

The square root of 669059693 is about 25866.1882193724. The cubic root of 669059693 is about 874.6244670966.

The spelling of 669059693 in words is "six hundred sixty-nine million, fifty-nine thousand, six hundred ninety-three".