what is this number in text form? 11666666666666666666666

11666666666666666666666

Let's add some commas to make it easier to read... (Or periods in some countries)

11,666,666,666,666,666,666,666

 

Now, the level of magnitude of the 11 is 10^21, also known as "Sextillion".

So we have:

11 Sextillion, 666 Quintillion, 666 Quadrillion, 666 Trillion, 666 Million, 666 thousand, 6 hundred and 66

or: 

Eleven Sextillion, six hundred and sixty six Quintillion, six hundred and sixty six Quadrillion, six hundred and sixty six Trillion, six hundred and sixty six Million, six hundred and sixty six thousand, six hundred and sixty six.