505166 has 4 divisors (see below), whose sum is σ = 757752. Its totient is φ = 252582.

The previous prime is 505159. The next prime is 505181. The reversal of 505166 is 661505.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 505166.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126290 + ... + 126293.

It is an arithmetic number, because the mean of its divisors is an integer number (189438).

2⁵⁰⁵¹⁶⁶ is an apocalyptic number.

505166 is a deficient number, since it is larger than the sum of its proper divisors (252586).

505166 is a wasteful number, since it uses less digits than its factorization.

505166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252585.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 505166 is about 710.7503077734. The cubic root of 505166 is about 79.6424670074.

The spelling of 505166 in words is "five hundred five thousand, one hundred sixty-six".