669606079 has 2 divisors, whose sum is σ = 669606080. Its totient is φ = 669606078.

The previous prime is 669606073. The next prime is 669606121. The reversal of 669606079 is 970606966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 669606079 - 2³ = 669606071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669606071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334803039 + 334803040.

It is an arithmetic number, because the mean of its divisors is an integer number (334803040).

Almost surely, 2^669606079 is an apocalyptic number.

669606079 is a deficient number, since it is larger than the sum of its proper divisors (1).

669606079 is an equidigital number, since it uses as much as digits as its factorization.

669606079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 669606079 is about 25876.7478443486. The cubic root of 669606079 is about 874.8624889756.

The spelling of 669606079 in words is "six hundred sixty-nine million, six hundred six thousand, seventy-nine".