CREATE TABLE table_47816 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Attendance" FLOAT)

What week had attendance of 64,146?
SELECT MIN("Week") FROM table_47816 WHERE "Attendance" = '64,146'
SELECT MIN("Week") FROM "table_47816" WHERE "Attendance" = '64,146'