573666 has 16 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 182864.

The previous prime is 573647. The next prime is 573673. The reversal of 573666 is 666375.

It is a super-3 number, since 3×573666³ = 566367843330516888, which contains 333 as substring.

It is an unprimeable number.

573666 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1941 + ... + 2216.

It is an arithmetic number, because the mean of its divisors is an integer number (74844).

2⁵⁷³⁶⁶⁶ is an apocalyptic number.

573666 is an abundant number, since it is smaller than the sum of its proper divisors (623838).

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

573666 is a wasteful number, since it uses less digits than its factorization.

573666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185.

The product of its digits is 22680, while the sum is 33.

The square root of 573666 is about 757.4074200851. The cubic root of 573666 is about 83.0908184787.

The spelling of 573666 in words is "five hundred seventy-three thousand, six hundred sixty-six".