5566521 has 16 divisors (see below), whose sum is σ = 7761600. Its totient is φ = 3544128.

The previous prime is 5566511. The next prime is 5566523. The reversal of 5566521 is 1256655.

It is not a de Polignac number, because 5566521 - 2⁵ = 5566489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5566523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9190 + ... + 9776.

It is an arithmetic number, because the mean of its divisors is an integer number (485100).

Almost surely, 2^5566521 is an apocalyptic number.

It is an amenable number.

5566521 is a deficient number, since it is larger than the sum of its proper divisors (2195079).

5566521 is a wasteful number, since it uses less digits than its factorization.

5566521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728.

The product of its digits is 9000, while the sum is 30.

The square root of 5566521 is about 2359.3475793109. The cubic root of 5566521 is about 177.2262101844.

The spelling of 5566521 in words is "five million, five hundred sixty-six thousand, five hundred twenty-one".