22006566 has 24 divisors (see below), whose sum is σ = 49447944. Its totient is φ = 7335360.

The previous prime is 22006531. The next prime is 22006571. The reversal of 22006566 is 66560022.

22006566 is a `hidden beast` number, since 2 + 2 + 0 + 0 + 656 + 6 = 666.

It is a super-2 number, since 2×22006566² = 968577894224712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22155 + ... + 23126.

It is an arithmetic number, because the mean of its divisors is an integer number (2060331).

Almost surely, 2^22006566 is an apocalyptic number.

22006566 is an abundant number, since it is smaller than the sum of its proper divisors (27441378).

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

22006566 is an equidigital number, since it uses as much as digits as its factorization.

22006566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45298 (or 45286 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 22006566 is about 4691.1156455581. The cubic root of 22006566 is about 280.2318063386.

Adding to 22006566 its reverse (66560022), we get a palindrome (88566588).

The spelling of 22006566 in words is "twenty-two million, six thousand, five hundred sixty-six".