Perfect Square
664418961914133036677887308299941545846967681 is a perfect square (25776325609251079536959 × 25776325609251079536959)
664418961914133036677887308299941545846967681 is a perfect square (25776325609251079536959 × 25776325609251079536959)
664418961914133036677887308299941545846967681 is odd
Previous odd number is 664418961914133036677887308299941545846967679
Next odd number is 664418961914133036677887308299941545846967683
11101110010110010011111010111001111001110100100111111010000110100100001111011001101110010010000011001110110010110110110010011010001110000110110000001
293309449623759103745849478145453413448860602979123074461983741500614844235352322976949111161404261238906737709173630762515107931482241
441452556951054166726232762857403339368470593830582395485902965397254111325768542658517761