Perfect Square
668964991883645601 is a perfect square (817902801 × 817902801)
668964991883645601 is a perfect square (817902801 × 817902801)
668964991883645601 is odd
Previous odd number is 668964991883645599
Next odd number is 668964991883645603
1001 0100 1000 1010 0100 0001 1101 1010 0100 0110 0101 1001 0010 1010 0001