505566673 has 2 divisors, whose sum is σ = 505566674. Its totient is φ = 505566672.

The previous prime is 505566661. The next prime is 505566707. The reversal of 505566673 is 376665505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319980544 + 185586129 = 17888^2 + 13623^2 .

It is a cyclic number.

It is not a de Polignac number, because 505566673 - 2²¹ = 503469521 is a prime.

It is not a weakly prime, because it can be changed into another prime (505566623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252783336 + 252783337.

It is an arithmetic number, because the mean of its divisors is an integer number (252783337).

Almost surely, 2^505566673 is an apocalyptic number.

It is an amenable number.

505566673 is a deficient number, since it is larger than the sum of its proper divisors (1).

505566673 is an equidigital number, since it uses as much as digits as its factorization.

505566673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567000, while the sum is 43.

The square root of 505566673 is about 22484.8098279705. The cubic root of 505566673 is about 796.6351761467.

The spelling of 505566673 in words is "five hundred five million, five hundred sixty-six thousand, six hundred seventy-three".