are 66 days enough to crack jee advance with good rank

Hello student yes yes as you've around more than 2 month from now start preparing for at least 10-12 hours each day. As JEE advance is considered as one of the toughest entrance examination make sure you're devoting enough time on your preparation.
Solve as much questions as possible it'll help you with more conceptual type of questions as we as variety of questions

Must solve 5 previous year question paper.
Feel free to comment if you have any doubt
Good luck