199766 has 16 divisors (see below), whose sum is σ = 360960. Its totient is φ = 81000.

The previous prime is 199753. The next prime is 199777. The reversal of 199766 is 667991.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

199766 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 7 ways as a sum of consecutive naturals, for example, 110 + ... + 641.

It is an arithmetic number, because the mean of its divisors is an integer number (22560).

2¹⁹⁹⁷⁶⁶ is an apocalyptic number.

199766 is a deficient number, since it is larger than the sum of its proper divisors (161194).

199766 is a wasteful number, since it uses less digits than its factorization.

199766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779.

The product of its digits is 20412, while the sum is 38.

The square root of 199766 is about 446.9518989780. The cubic root of 199766 is about 58.4575385253.

The spelling of 199766 in words is "one hundred ninety-nine thousand, seven hundred sixty-six".