545566 has 24 divisors (see below), whose sum is σ = 1005480. Its totient is φ = 220752.

The previous prime is 545551. The next prime is 545579. The reversal of 545566 is 665545.

It is a congruent number.

It is an unprimeable number.

545566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1716 + ... + 2008.

It is an arithmetic number, because the mean of its divisors is an integer number (41895).

2⁵⁴⁵⁵⁶⁶ is an apocalyptic number.

545566 is a deficient number, since it is larger than the sum of its proper divisors (459914).

545566 is a wasteful number, since it uses less digits than its factorization.

545566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 321 counting only the distinct ones).

The product of its digits is 18000, while the sum is 31.

The square root of 545566 is about 738.6243971059. The cubic root of 545566 is about 81.7113587577.

It can be divided in two parts, 545 and 566, that added together give a palindrome (1111).

The spelling of 545566 in words is "five hundred forty-five thousand, five hundred sixty-six".