5566561 has 32 divisors (see below), whose sum is σ = 7676928. Its totient is φ = 3896640.

The previous prime is 5566559. The next prime is 5566567. The reversal of 5566561 is 1656655.

It is not a de Polignac number, because 5566561 - 2¹ = 5566559 is a prime.

5566561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5566567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67026 + ... + 67108.

It is an arithmetic number, because the mean of its divisors is an integer number (239904).

Almost surely, 2^5566561 is an apocalyptic number.

It is an amenable number.

5566561 is a deficient number, since it is larger than the sum of its proper divisors (2110367).

5566561 is a wasteful number, since it uses less digits than its factorization.

5566561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181.

The product of its digits is 27000, while the sum is 34.

The square root of 5566561 is about 2359.3560562153. The cubic root of 5566561 is about 177.2266346884.

It can be divided in two parts, 556 and 6561, that added together give a palindrome (7117).

The spelling of 5566561 in words is "five million, five hundred sixty-six thousand, five hundred sixty-one".