-100
557 is a prime number because it factors are: 1 and 557
1, 3, 9, 73, 219, 657
9907 + 657 = 10564
703
989 + 657 = 1646
65789+657=66446.
657 is a composite number.
997
657 rounded to the nearest ten is 660. 657 rounded to the nearest hundred is 700.
557 is a prime.
557 = DLVII
557.0