Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_14463 ( "Urban area" text, "Population 1.1.2009" text, "Population 1.1.2008" real, "Population 1.1.2007" text, "Population 1.1.2006" real, "Population per square km" real )

### Question ###
Name the total number of population per square km with population 1.12006 of 12.757

### Accurate SQL ###

SELECT COUNT("Population per square km") FROM table_14463 WHERE "Population 1.1.2006" = '12.757'