Perfect Square
66536913172864213249 is a perfect square (8157016193 × 8157016193)
66536913172864213249 is a perfect square (8157016193 × 8157016193)
66536913172864213249 is odd
Previous odd number is 66536913172864213247
Next odd number is 66536913172864213251
111001101101100010100110100000000011000111100101001010000100000001
294569614721568553449753189407855013302281094677557869077249