Even if i do agree with @Rehan Ullah's answer.
I would like to add that indeed in some sahaba's -earlier- Quran copies the Verse (33/6)
was read "وأزواجه أمهاتهم وهو أب لهم" by Ubay ibn Ka'ab (May Allah be pleased with him) which means -be careful this is my own translation- (and his wife are their mothers and he's a father for them) and "النبي أولى بالمؤمنين من أنفسهم وأزواجه أمهاتهم وهو أب لهم" by ibn 'Abas (May Allah be pleased with both of them) which means -again my own translation- (The Prophet is more worthy of the believers than themselves, and his wives are their mothers and he's a father for them) according to tafsir al-Qurtubi and ibn Kathir. I read that ibn 'Abas had read this in front of 'Omar ibn al-Khattab who asked him about who recited it like that and he told him that he heard it from Ubay ibn Ka'ab so it was in Ubay's Moshaf!
As this Version has not been included in the Quran which 'Othman ibn 'Affan (May Allah be pleased with him) has "collected" this must be an ahad riwaya or a qira-a shadha and therefore not acceptable القرآن لا يثبت بالآحاد, but it could be used to understand the Quran and some of the ahkam. For example if we applied the Verse of surat al-Jumu'a (62:9) as is we should run to the prayer of friday ( فاسعوا إلى ذكر الله), but on one hand we know that this isn't permissible for prayers and on the other hand al-hamdulillah we have an explanation in the Qira-a of ibn Mas'ud and 'Omar ibn al-Khattab (May Allah be pleased with both of them) telling us that we should go ( فامضوا إلى ذكر الله ) normally (some further information could be found in my answer here)!
And ibn Kathir quotes a hadith which is quoted in Sunan ibn Majah, Sunan abi Dawod and Sunan an-Nasa'i (different Versions) where the Messenger of Allah (Peace be upon him) himself says to his sahaba(May allah be pleased with them):
"I'm to you like a father to his son".
So in the shafi'i school some said it's permissible to call our Prophet (Peace be upon him) father of the believers as honor like it is the case for his wifes!
Others said that it is not (or no more) permissible because of the Verse 33/40!
They have also disscussed the matter if one could call somebody aunts of the mu'minyn or sister of the mu'mimnyn for his daughters and so on!
And Allah knows best