Contradiction with Genesis 46:27
Genesis 46:27 states that there were seventy people in total who came to Egypt with Jacob, contradicting Exodus 1:5 which states sixty-six.
Genesis 46:27: And the sons of Joseph, which were born him in Egypt, [were] two souls: all the souls of the house of Jacob, which came into Egypt, [were] threescore and ten.
Contradiction with Acts 7:14
Acts 7:14 mentions that seventy-five people went down to Egypt, differing from the sixty-six mentioned in Exodus 1:5.
Acts 7:14: Then sent Joseph, and called his father Jacob to [him], and all his kindred, threescore and fifteen souls.