606666589 has 2 divisors, whose sum is σ = 606666590. Its totient is φ = 606666588.

The previous prime is 606666587. The next prime is 606666611. The reversal of 606666589 is 985666606.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538472025 + 68194564 = 23205^2 + 8258^2 .

It is a cyclic number.

It is not a de Polignac number, because 606666589 - 2¹ = 606666587 is a prime.

Together with 606666587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (606666587) 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, 303333294 + 303333295.

It is an arithmetic number, because the mean of its divisors is an integer number (303333295).

Almost surely, 2^606666589 is an apocalyptic number.

It is an amenable number.

606666589 is a deficient number, since it is larger than the sum of its proper divisors (1).

606666589 is an equidigital number, since it uses as much as digits as its factorization.

606666589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The square root of 606666589 is about 24630.6026925855. The cubic root of 606666589 is about 846.5449550348.

The spelling of 606666589 in words is "six hundred six million, six hundred sixty-six thousand, five hundred eighty-nine".