669268679 has 2 divisors, whose sum is σ = 669268680. Its totient is φ = 669268678.

The previous prime is 669268667. The next prime is 669268687. The reversal of 669268679 is 976862966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 669268679 - 2⁸ = 669268423 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 (669268079) 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, 334634339 + 334634340.

It is an arithmetic number, because the mean of its divisors is an integer number (334634340).

Almost surely, 2^669268679 is an apocalyptic number.

669268679 is a deficient number, since it is larger than the sum of its proper divisors (1).

669268679 is an equidigital number, since it uses as much as digits as its factorization.

669268679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 59.

The square root of 669268679 is about 25870.2276565167. The cubic root of 669268679 is about 874.7155228687.

The spelling of 669268679 in words is "six hundred sixty-nine million, two hundred sixty-eight thousand, six hundred seventy-nine".