What number is 10658585? Can individuals use it to send short messages to designated people? How do people know that I sent the text message? Anything.

10658585 is the phone number of 12580 merchant alliance. This is the largest merchant alliance website built by China Mobile in China, which is to engage in some discounts, promotions and group purchases. The short messages starting with 1062, 1063, 1065, 1066 and 1069 are all short message service numbers operated by operators and translated into short message numbers promoted by operators.

Of course you can't use it to send messages to others, because that's not your number.