CREATE TABLE table_3644 ("Country or territory with flag" TEXT, "Area  ( km\\u00b2 )   ( per sqmi ) " TEXT, "Population  ( July 2009 est. ) " FLOAT, "Population density per km\\u00b2" TEXT, "Capital" TEXT)

What was the maximum population of the country with Quito as capital?
SELECT MAX("Population (July 2009 est.)") FROM table_3644 WHERE "Capital" = 'Quito'
SELECT MAX("Population (July 2009 est.)") FROM "table_3644" WHERE "Capital" = 'Quito'