This calls for a mind with wisdom. The seven heads are seven mountains on which the woman sits.
Cross References
Revelation 13:18Here is a call for wisdom: Let the one who has insight calculate the number of the beast, for it is the number of a man, and that number is 666.
Revelation 17:3And the angel carried me away in the Spirit into a wilderness, where I saw a woman sitting on a scarlet beast that was covered with blasphemous names and had seven heads and ten horns.
Treasury of Scripture
And here is the mind which has wisdom. The seven heads are seven mountains, on which the woman sits.
here.
Revelation 13:18
Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is Six hundred threescore and six.
Daniel 12:4,8-10
But thou, O Daniel, shut up the words, and seal the book, even to the time of the end: many shall run to and fro, and knowledge shall be increased…
Hosea 14:9
Who is wise, and he shall understand these things? prudent, and he shall know them? for the ways of the LORD are right, and the just shall walk in them: but the transgressors shall fall therein.
The seven.
Revelation 17:3,7,18
So he carried me away in the spirit into the wilderness: and I saw a woman sit upon a scarlet coloured beast, full of names of blasphemy, having seven heads and ten horns…
Revelation 13:1
And I stood upon the sand of the sea, and saw a beast rise up out of the sea, having seven heads and ten horns, and upon his horns ten crowns, and upon his heads the name of blasphemy.