>According to Revelation, John saw a "myriad of myriads," which is 10,000 x 10,000, or one billion.

? TRANSFORM(10000 * 10000, "999,999,999,999")
    100,000,000

My mistake ... 100 million, not a billion. Also, these were the angels around the throne, not the people. The people are numbered in an untold, uncountable way:

Revelation 7:9 - KJV - "9 After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands;"

The white robes were given them when they accepted Jesus Christ.