'Number' in the Bible

And I saw, and I heard the voice of many angels around the throne and the living creatures and the elders; and their number was ten thousands of ten thousands and thousands of thousands;

And I heard the number of the sealed, a hundred and forty-four thousand, sealed out of every tribe of the sons of Israel:

After these things I saw, and lo, a great crowd, which no one could number, out of every nation and tribes and peoples and tongues, standing before the throne, and before the Lamb, clothed with white robes, and palm branches in their hands.

and the number of the hosts of horse was twice ten thousand times ten thousand. I heard their number.

and that no one should be able to buy or sell save he that had the mark, the name of the beast, or the number of its name.

Here is wisdom. He that has understanding let him count the number of the beast: for it is a man's number; and its number is six hundred and sixty-six.

And I saw as a glass sea, mingled with fire, and those that had gained the victory over the beast, and over its image, and over the number of its name, standing upon the glass sea, having harps of God.

and shall go out to deceive the nations which are in the four corners of the earth, Gog and Magog, to gather them together to the war, whose number is as the sand of the sea.