What is the lowest female number of the hiroo 1-chōme district, which has more than 1,666 households?
CREATE TABLE "population_of_hiroo_district_july_2008" (
  "district" text,
  "number_of_households" real,
  "total_population" real,
  "male" real,
  "female" real
);
SELECT MIN("female") FROM "population_of_hiroo_district_july_2008" WHERE "district"='hiroo 1-chōme' AND "number_of_households">'1,666';