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_21109892_1 ( rank VARCHAR, production__mt_ VARCHAR )

### Question ###
When the production (mt) is 650000, what is the total number of rank?

### Accurate SQL ###

SELECT COUNT(rank) FROM table_21109892_1 WHERE production__mt_ = 650000