625, the square of 25, is the only square number between 602 and 671.
Considering only natural numbers, besides the obvious 1 x 671, the only combination of two numbers that multiplies into 671 is 11 x 61 (or 61 x 11, of course).
The numbers are 670, 671 and 672.
671
671
671 air miles.
10 to 1
671 or 6910
671, 1342, 2013, 2684, 3355, 4026 +671 . . .
671 miles
The population density of Lielvārde is 671 people per square kilometer.
The population density of Kårvåg is 671 people per square kilometer.
Listerby's population density is 671 people per square kilometer.