Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_22 (grid INTEGER, manufacturer VARCHAR, time_retired VARCHAR)
### Question:
What was the highest grid value for riders with manufacturer of Aprilia and time of +1.660?
### Answer:
SELECT MAX(grid) FROM table_name_22 WHERE manufacturer = "aprilia" AND time_retired = "+1.660"