5665566 has 8 divisors (see below), whose sum is σ = 11331144. Its totient is φ = 1888520.

The previous prime is 5665559. The next prime is 5665571. The reversal of 5665566 is 6655665.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

5665566 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472125 + ... + 472136.

It is an arithmetic number, because the mean of its divisors is an integer number (1416393).

Almost surely, 2^5665566 is an apocalyptic number.

5665566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

5665566 is a wasteful number, since it uses less digits than its factorization.

5665566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944266.

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

The square root of 5665566 is about 2380.2449453785. The cubic root of 5665566 is about 178.2711643625.

Subtracting 5665566 from its reverse (6655665), we obtain a palindrome (990099).

The spelling of 5665566 in words is "five million, six hundred sixty-five thousand, five hundred sixty-six".