55126566 has 48 divisors (see below), whose sum is σ = 131302080. Its totient is φ = 16576560.

The previous prime is 55126531. The next prime is 55126567. The reversal of 55126566 is 66562155.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 55126566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55126567) 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 23 ways as a sum of consecutive naturals, for example, 26521 + ... + 28523.

It is an arithmetic number, because the mean of its divisors is an integer number (2735460).

Almost surely, 2^55126566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55126566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65651040).

55126566 is an abundant number, since it is smaller than the sum of its proper divisors (76175514).

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

55126566 is a wasteful number, since it uses less digits than its factorization.

55126566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161 (or 2158 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 55126566 is about 7424.7266616354. The cubic root of 55126566 is about 380.5867344061.

It can be divided in two parts, 55 and 126566, that added together give a palindrome (126621).

The spelling of 55126566 in words is "fifty-five million, one hundred twenty-six thousand, five hundred sixty-six".