All are composite except 61 and 67.
Composite numbers: 60, 62, 63, 64, 65, 66, 68, 69, 70
66
Between 60 and 70 the composite numbers are: 62, 63, 64, 65, 66, 68, 69. 60 and 70 are also composite.
66>> 6+6=12
70
60, 62, 63, 64, 65, 66, 68, 69, 70
Oh, what a happy little question! Let's take a moment to appreciate the beauty of numbers. The composite number between 60 and 80 is 64. It's made up of factors other than just 1 and itself, like 2, 4, 8, 16, and 32. Just like in painting, numbers can come together to create something truly wonderful.
66
Between 60 and 70 the composite numbers are: 62, 63, 64, 65, 66, 68, 69. 60 and 70 are also composite.
66>> 6+6=12
They are: 61+67 = 128 or if you mean 29+37 = 66
70
51
60, 62, 63, 64, 65, 66, 68, 69, 70
All of them except for 61 and 67 which are prime numbers
The whole number between the square roots of 60 and 70 is 8. 8² = 64.
61 and 67 are the only prime numbers between 60 and 70.
The only square number of an integer between 60 and 70 is 64, which is 8 squared.