9566561 has 2 divisors, whose sum is σ = 9566562. Its totient is φ = 9566560.

The previous prime is 9566539. The next prime is 9566567. The reversal of 9566561 is 1656659.

9566561 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., 7054336 + 2512225 = 2656^2 + 1585^2 .

It is an emirp because it is prime and its reverse (1656659) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9566561 - 2¹⁰ = 9565537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9566567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4783280 + 4783281.

It is an arithmetic number, because the mean of its divisors is an integer number (4783281).

Almost surely, 2^9566561 is an apocalyptic number.

It is an amenable number.

9566561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9566561 is an equidigital number, since it uses as much as digits as its factorization.

9566561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 38.

The square root of 9566561 is about 3092.9857742964. The cubic root of 9566561 is about 212.2846612123.

The spelling of 9566561 in words is "nine million, five hundred sixty-six thousand, five hundred sixty-one".