CREATE TABLE table_26736040_1 (title VARCHAR2, us_viewers__millions_ VARCHAR2)

How many titles have U.S. viewers 1.66 million.
SELECT COUNT(title) FROM table_26736040_1 WHERE us_viewers__millions_ = "1.66"
SELECT COUNT("title") FROM "table_26736040_1" WHERE "1.66" = "us_viewers__millions_"