199566 has 12 divisors (see below), whose sum is σ = 432432. Its totient is φ = 66516.

The previous prime is 199559. The next prime is 199567. The reversal of 199566 is 665991.

199566 is a `hidden beast` number, since 1 + 99 + 566 = 666.

199566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 199566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199567) by changing a digit.

199566 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, 5526 + ... + 5561.

It is an arithmetic number, because the mean of its divisors is an integer number (36036).

2¹⁹⁹⁵⁶⁶ is an apocalyptic number.

199566 is an abundant number, since it is smaller than the sum of its proper divisors (232866).

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

199566 is a wasteful number, since it uses less digits than its factorization.

199566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11095 (or 11092 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 199566 is about 446.7281052273. The cubic root of 199566 is about 58.4380233398.

The spelling of 199566 in words is "one hundred ninety-nine thousand, five hundred sixty-six".