With a JEE Main CRL rank of 660400  the chances of securing admission in the top NITs or IIITs are quite low because these institutes have cutoff ranks within the first few hundred thousand ranks. However you can explore the official website of the NTA to know more about the previous year trends like opening and closing ranks for various colleges . You can also participate in the state counselling to further increase your chances of getting admission in the college.

You can take help of our college predictor which can help you in finding the best colleges suited to your rank and category. The link is mentioned below:

https://engineering.careers360.com/jee-main-college-predictor?utm_source=qna&utm_medium=jee_cp

Hope this resolves your query.