Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_66 ( rank VARCHAR, total VARCHAR, silver VARCHAR )

### Question ###
What is the rank of the country with total more than 3 and more than 6 silver?

### Accurate SQL ###

SELECT rank FROM table_name_66 WHERE total > 3 AND silver > 6