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_30536 ( "Episode" real, "1st season" text, "2nd season" text, "3rd season" text, "4th season" text, "5th season" text, "6th season" text, "7th season" text )

### Question ###
How many 7th season episodes had 2nd season viewerships of 6 594 469?

### Accurate SQL ###

SELECT COUNT("7th season") FROM table_30536 WHERE "2nd season" = '6 594 469'