'Number' in the Bible

And I saw, and I heard a voice of many angels round about the throne and the living creatures and the elders; and the number of them was ten thousand times ten thousand, and thousands of thousands;

And I heard the number of them that were sealed, a hundred and forty and four thousand, sealed out of every tribe of the children of Israel:

After these things I saw, and behold, a great multitude, which no man could number, out of every nation and of all tribes and peoples and tongues, standing before the throne and before the Lamb, arrayed in white robes, and palms in their hands;

And the number of the armies of the horsemen was twice ten thousand times ten thousand: I heard the number of them.

and that no man should be able to buy or to sell, save he that hath the mark, even the name of the beast or the number of his name.

Here is wisdom. He that hath understanding, let him count the number of the beast; for it is the number of a man: and his number is Six hundred and sixty and six.

And I saw as it were a sea of glass mingled with fire; and them that come off victorious from the beast, and from his image, and from the number of his name, standing by the sea of glass, having harps of God.

and shall come forth to deceive the nations which are in the four corners of the earth, Gog and Magog, to gather them together to the war: the number of whom is as the sand of the sea.