Many Muslims say the qor'an has 6666 verses, whether there is an edition with 6666 verses, I don't know. Perhaps the best way to look at this issue is to call 6666 the "popular" number of verses in the Qor'an.
The qur'an took 23 years to complete and was written by The Prophet Muhammad but handed down to him by a higher power.
The qur'an is divided into thirty equal divisions, which are called juz in Arabic. There are 114 chapters and 336,233 letters.