Perfect Square
668216787429168961 is a perfect square (817445281 × 817445281)
668216787429168961 is a perfect square (817445281 × 817445281)
668216787429168961 is odd
Previous odd number is 668216787429168959
Next odd number is 668216787429168963
1001 0100 0101 1111 1011 1010 0000 1011 0111 1010 1011 0001 0111 0100 0001