How do you say this number 6000000000000000000?

The number 6,000,000,000,000,000,000 can be read as "six quintillion" in the short scale naming system, commonly used in the United States. In the long scale naming system, used in some European countries, it would be called "six quadrillion." The number is composed of six groups of three zeros, each representing a different place value in the number.