5566 has 12 divisors (see below), whose sum is σ = 9576. Its totient is φ = 2420.

The previous prime is 5563. The next prime is 5569. The reversal of 5566 is 6655.

It is an interprime number because it is at equal distance from previous prime (5563) and next prime (5569).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a pancake number, because a pancake can be divided into 5566 parts by 105 straight cuts.

Its product of digits (900) is a multiple of the sum of its prime divisors (36).

It is a plaindrome in base 10 and base 16.

It is a nialpdrome in base 11.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 231 + ... + 253.

It is an arithmetic number, because the mean of its divisors is an integer number (798).

2⁵⁵⁶⁶ is an apocalyptic number.

5566 is a deficient number, since it is larger than the sum of its proper divisors (4010).

5566 is a wasteful number, since it uses less digits than its factorization.

5566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47 (or 36 counting only the distinct ones).

The product of its digits is 900, while the sum is 22.

The square root of 5566 is about 74.6056298144. The cubic root of 5566 is about 17.7220680834.

5566 divided by its sum of digits (22) gives a triangular number (253 = T₂₂).

Adding to 5566 its reverse (6655), we get a palindrome (12221).

Subtracting 5566 from its reverse (6655), we obtain a square (1089 = 33²).

It can be divided in two parts, 55 and 66, that added together give a palindrome (121).

The spelling of 5566 in words is "five thousand, five hundred sixty-six".