5565666 has 32 divisors (see below), whose sum is σ = 11487168. Its totient is φ = 1797120.

The previous prime is 5565643. The next prime is 5565667. The reversal of 5565666 is 6665655.

It is a happy number.

5565666 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (5565667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42421 + ... + 42551.

It is an arithmetic number, because the mean of its divisors is an integer number (358974).

Almost surely, 2^5565666 is an apocalyptic number.

5565666 is an abundant number, since it is smaller than the sum of its proper divisors (5921502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5565666 is a wasteful number, since it uses less digits than its factorization.

5565666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306.

The product of its digits is 162000, while the sum is 39.

The square root of 5565666 is about 2359.1663781938. The cubic root of 5565666 is about 177.2171359249.

The spelling of 5565666 in words is "five million, five hundred sixty-five thousand, six hundred sixty-six".