505566 has 12 divisors (see below), whose sum is σ = 1095432. Its totient is φ = 168516.

The previous prime is 505559. The next prime is 505573. The reversal of 505566 is 665505.

505566 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (505559) and next prime (505573).

It is a congruent number.

It is an unprimeable number.

505566 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 5 ways as a sum of consecutive naturals, for example, 14026 + ... + 14061.

It is an arithmetic number, because the mean of its divisors is an integer number (91286).

2⁵⁰⁵⁵⁶⁶ is an apocalyptic number.

505566 is an abundant number, since it is smaller than the sum of its proper divisors (589866).

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

505566 is a wasteful number, since it uses less digits than its factorization.

505566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28095 (or 28092 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 505566 is about 711.0316448654. The cubic root of 505566 is about 79.6634822658.

The spelling of 505566 in words is "five hundred five thousand, five hundred sixty-six".