No, just 67.
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There are 3 prime numbers between 64 and 77: 67 71 73.
67 is prime.
29, 61, 23, 97, 41, and 67 are prime. 81, 51, 93, 77, and 39 are composite.
There are 21 prime numbers between 1 and 77: 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73.
A prime number is a number that is divisible only by 1 and itself; it has no other factors. A composite number is a number that is divisible by more than 2 numbers. The factors of 77 are 1, 7, 11, and 77. Therefore, 77 is a composite number.