1 And it came to pass when the children of men had multiplied that in those days were born unto them beautiful and comely daughters.

2 And the angels, the children of the heaven, saw and lusted after them, and said to one another: 'Come, let us choose us wives from among the children of men

3 and beget us children.' And Semjaza, who was their leader, said unto them:

Enoch then continues to discuss a deal he makes with fellow Watchers to all commit the same sin.

In verse 7, it says that there were 200 chiefs on the summit of Mount Hermon, which is located on the border of Lebanon and Syria and stands over 9,000 feet high. They agreed to come to earth and cohabitate with women.

These 200 chiefs were each in charge of tens of thousands of other Watchers. So how many fell with them.We do not know, maybe they all did. That would put the number into the hundreds of thousands that fell from heaven and came to earth.