5518566 has 12 divisors (see below), whose sum is σ = 11956932. Its totient is φ = 1839516.

The previous prime is 5518553. The next prime is 5518567. The reversal of 5518566 is 6658155.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5518566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5518567) 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 5 ways as a sum of consecutive naturals, for example, 153276 + ... + 153311.

It is an arithmetic number, because the mean of its divisors is an integer number (996411).

Almost surely, 2^5518566 is an apocalyptic number.

5518566 is an abundant number, since it is smaller than the sum of its proper divisors (6438366).

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

5518566 is a wasteful number, since it uses less digits than its factorization.

5518566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306595 (or 306592 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 5518566 is about 2349.1628296055. The cubic root of 5518566 is about 176.7158132323.

It can be divided in two parts, 5518 and 566, that added together give a square (6084 = 78²).

The spelling of 5518566 in words is "five million, five hundred eighteen thousand, five hundred sixty-six".