If you just want the numerical value for it:
467.69 (Rounded to 2 d.p.)
If you wanted it as a single surd:
x^2 = 2 * 6 * 110 * 165 = 217800
thus: x = Sqrt(217800)
= 2 * Sqrt(54450)
= 2*5 * Sqrt(2178)
= 10*3 * Sqrt(242)
= 30*11 * Sqrt(2)
= 330 * Sqrt(2)