According to the author of the book, Nehemiah is telling us about a big family named Bigvai, who had exactly 2,067 people in it. It shows how carefully they counted and remembered all the families who came back to help rebuild their city.
Nehemiah 7:19: The children of Bigvai, two thousand threescore and seven.
This verse questions how two can walk together unless they agree, while Nehemiah 7:19 lists differing individuals as part of a unified group, suggesting unity despite potential differences.
Amos 3:3: Can two walk together, except they be agreed?