606666677 has 2 divisors, whose sum is σ = 606666678. Its totient is φ = 606666676.

The previous prime is 606666629. The next prime is 606666679. The reversal of 606666677 is 776666606.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540748516 + 65918161 = 23254^2 + 8119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-606666677 is a prime.

Together with 606666679, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (606666679) 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, 303333338 + 303333339.

It is an arithmetic number, because the mean of its divisors is an integer number (303333339).

Almost surely, 2^606666677 is an apocalyptic number.

It is an amenable number.

606666677 is a deficient number, since it is larger than the sum of its proper divisors (1).

606666677 is an equidigital number, since it uses as much as digits as its factorization.

606666677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 50.

The square root of 606666677 is about 24630.6044789810. The cubic root of 606666677 is about 846.5449959667.

The spelling of 606666677 in words is "six hundred six million, six hundred sixty-six thousand, six hundred seventy-seven".