Any score between 580 - 669 is considered a "Fair" score. The 637 FICO (r) Score is lower than the average credit score.
Certain lenders view those who have scores that are in the Fair range as having poor credit and will likely deny their credit applications. Such a score can make it difficult to be approved for a good line of credit or loan and may even stop the possibility of leasing an apartment or securing certain positions.