When the production (mt) is 650000, what is the total number of rank?
CREATE TABLE table_21109892_1 (
    rank VARCHAR,
    production__mt_ VARCHAR
)
SELECT COUNT(rank) FROM table_21109892_1 WHERE production__mt_ = 650000
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: When the production (mt) is 650000, what is the total number of rank? ### Input: CREATE TABLE table_21109892_1 (
    rank VARCHAR,
    production__mt_ VARCHAR
) ### Response: SELECT COUNT(rank) FROM table_21109892_1 WHERE production__mt_ = 650000