human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: INEGI code, Municipality, Municipal Seat, Area (km 2 ), Population (2005), Population density (/km 2 ), Human Development Index (2000)
###Question: WHich INEGI code has a Population density (/km 2 ) smaller than 81.4 and 0.6593 Human Development Index (2000)?
gpt
SELECT AVG INEGI code FROM table WHERE Population density (/km 2 ) < 81.4 AND Human Development Index (2000) = 0.6593