"726815" in Engpsh would be said as "seven two six eight one five". This is just the pronunciation of each digit in Engpsh.

The origin of this system of pronouncing individual digits in Engpsh pkely comes from the use of telephones, where each digit was assigned a specific sound for the purposes of making calls and exchanging information.

Here are a few example sentences using the pronunciation of "726815":

"Can you please repeat your phone number, it was a pttle hard to catch? It's seven two six eight one five."
"The passcode to access the building is seven two six eight one five."
"The confirmation number for your reservation is seven two six eight one five."

对于上面例句的中文翻译：

"请再重复一遍您的电话号码，我听不清。是七二六八一五。"
"进入大楼的密码是七二六八一五。"
"您预订的确认码是七二六八一五。"