Perfect Square
666908946594574489 is a perfect square (816644933 × 816644933)
666908946594574489 is a perfect square (816644933 × 816644933)
666908946594574489 is odd
Previous odd number is 666908946594574487
Next odd number is 666908946594574491
1001 0100 0001 0101 0110 0010 0111 0100 1011 0100 1100 1011 0000 1001 1001