346665689 has 2 divisors, whose sum is σ = 346665690. Its totient is φ = 346665688.

The previous prime is 346665679. The next prime is 346665707. The reversal of 346665689 is 986566643.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299290000 + 47375689 = 17300^2 + 6883^2 .

It is a cyclic number.

It is not a de Polignac number, because 346665689 - 2⁴ = 346665673 is a prime.

It is a super-3 number, since 3×346665689³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 346665689.

It is not a weakly prime, because it can be changed into another prime (346665679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173332844 + 173332845.

It is an arithmetic number, because the mean of its divisors is an integer number (173332845).

Almost surely, 2^346665689 is an apocalyptic number.

It is an amenable number.

346665689 is a deficient number, since it is larger than the sum of its proper divisors (1).

346665689 is an equidigital number, since it uses as much as digits as its factorization.

346665689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 53.

The square root of 346665689 is about 18618.9604704452. The cubic root of 346665689 is about 702.4848349711.

The spelling of 346665689 in words is "three hundred forty-six million, six hundred sixty-five thousand, six hundred eighty-nine".