Perfect Square
664485191405671321 is a perfect square (815159611 × 815159611)
664485191405671321 is a perfect square (815159611 × 815159611)
664485191405671321 is odd
Previous odd number is 664485191405671319
Next odd number is 664485191405671323
1001 0011 1000 1011 1001 1100 0010 1101 0000 0011 1110 0001 0011 1001 1001