encountering the number 666 in ordinary daily activities is no different from encountering the numbers 4 8 7 or 13 which are considered to be lucky/unlucky in various cultures.
The references in the Revelation of John are purely symbolic.
the best description I've heard about the meaning of the number of the beast is as follows:
3: The Divine number
7: the number of perfection
6: one less than perfection: therefore imperfect
666: triple (divine) imperfection. i.e. something not God setting himself up as God to directly challenge The Lord.
none of this matters.
now remember: the digits 666 will come up a lot i calculations using Decimal notation, because when you divide a number by 3 you will get the modulus 1 or 2.
(i.e 6/3 = 2 remainder 0
7/3 = 2 remainder 1
8/3 = 2 remainder 2)
Modulus is the mathematical term for "Remainder" but can exist without the product. therefore
6 mod 3 = 0
7 mod 3 = 1
8 mod 3 = 2
if you do this calculation on a digital calculator, the result comes out as a decimal fraction
1/3 = 0.3333333333333333°
2/3 = 0.6666666666666666°
if you only use 3 decimal places you get 0.666°
this means these 3 digits occur with an absolutely enormous frequency when performing calculations that include division. - especially when dividing by multiples of 3 such as 6, 12 , and 24, numbers of significance when calculations include elements of time such as hours months and years.