The roots are long enough.
As far as how to take it off, it's hard to tell. If you can pick it off and keep the roots attached, do it that way. It looks, however, that the roots won't come off with the keiki, especially the three going upwards. In that case, you'll have to cut the keiki off with part of the pseudobulb. If you cut right at the yellow ring that should work. Since this growth isn't going to bloom, you may as well operate and surgically remove it.
I don't think you'll have any problems, but keep your eye on the cut. I guess you could put some cinnamon on the cut, but I've never had to do that. It heals itself.