Perfect Square
1665291990198401041 is a perfect square (1290461929 × 1290461929)
1665291990198401041 is a perfect square (1290461929 × 1290461929)
1665291990198401041 is odd
Previous odd number is 1665291990198401039
Next odd number is 1665291990198401043
1011100011100010011100011110111110011000101000011100000010001