Is it possible to dunk1.66m?

Almost impossible. A normal person's arm can be more than 40 cm away from his head. Even if your arm span is longer than the average person, it's 50 cm. Then the height you touch in situ should not exceed 2 15. The height of the basket is 305. In order to maximize your run-up, you need to bounce 90 cm to barely touch the basket. This is still the case when there is nothing in your hand. Of course, you can't jump that high without anything in your hand.

Basketball is more than 25 cm in diameter, which means you have to jump at least 25 cm more, and you have a chance to dunk without defense. You can't jump to the highest height every time!

Calculated, it is 90+25= 1 15 cm before the dunk. I can tell you that the official vertical flight tester shows that few NBA players can jump more than 90 cm, and even fewer can jump more than 95 cm, and they are basically novices. I'm too old to jump. Take the magical Carter as an example. The champion of the dunk contest, Carter dunked less than 1 m, and was a professional athlete. I suggest you give up the idea of dunk.