565675661 has 2 divisors, whose sum is σ = 565675662. Its totient is φ = 565675660.

The previous prime is 565675637. The next prime is 565675681. The reversal of 565675661 is 166576565.

565675661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478253161 + 87422500 = 21869^2 + 9350^2 .

It is a cyclic number.

It is not a de Polignac number, because 565675661 - 2¹⁴ = 565659277 is a prime.

It is equal to p_29623799 and since 565675661 and 29623799 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (565675681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282837830 + 282837831.

It is an arithmetic number, because the mean of its divisors is an integer number (282837831).

Almost surely, 2^565675661 is an apocalyptic number.

565675661 is the 10637-th centered decagonal number.

It is an amenable number.

565675661 is a deficient number, since it is larger than the sum of its proper divisors (1).

565675661 is an equidigital number, since it uses as much as digits as its factorization.

565675661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134000, while the sum is 47.

The square root of 565675661 is about 23783.9370374209. The cubic root of 565675661 is about 827.0323500459.

The spelling of 565675661 in words is "five hundred sixty-five million, six hundred seventy-five thousand, six hundred sixty-one".