hello brindha , yes you are eligible to apply for admissin with 66 .16 percent.
LL.B.[Hons.] Degree Course is of 3 years duration. Each Academic Year is divided into 2 Semesters and each Semester consists of 90 working days. On successful completion of the course, LL.B.[Hons.] Degree will be awarded.
A candidate should have passed any Under Graduate Degree and should have secured not less than 60% of the total marks in the aggregate.
The percentage of marks obtained by the candidate in aggregate of all the subjects in the qualifying degree examination, excluding languages, may be taken into account. In case, where the language alone is the subject to qualifying examination, the percentage of marks obtained by the candidate in the said examination may be taken into account”(G.O. Ms. No.83 Law (LS) Department dt.19.04.2007).

please refer to this website for more info
https://glcsalem.ac.in/admission-procedure