Hexakosioihexekontahexaphobia is the fear of the number 666. While triskaidekaphobia, is the fear of the number 13. – WTF Fun Facts
Source: https://www.verywellmind.com/hexakosioihexekontahexaphobia-2671858
WTF Fun Fact – Hexakosioihexekontahexaphobia
Should be called stupiphobia.
I have Hippopotomonstrosesquippedaliophobia.