Total chapters of Al-Qur'an is 114.
If you add all the numbers from 1 + 2 + 3 + ...+114, you will have the total sum 6555

If you want to make the mathematical calculation, you have to convert everything to numbers.
The Numerical Value of the name of the Prophet Muhammad is consists of Mim, Ha, Mim, Dal.
Mim = 40 , Ha = 8, Mim = 40, Dal = 4.

Total Num. Value of the name (muhammad) = 92

Now, add the result of the total sum of the numbers of surahs to the Num.Value of the name.

6555 + 92 = 6647

66 is the Num. Value of A.L.L.A.H

Alif =1, Lam = 30, Lam = 30, Ha = 5 ----- 66

47 is total verses of surah Muhammad.
Visit: http://quran.com/47
http://noblequran.com/translation/surah47.html

ALLAH -----------------------------Muhamad

Allah the Almighty controlled everything.