12665648858 has 16 divisors (see below), whose sum is σ = 20141366784. Its totient is φ = 5962902480.

The previous prime is 12665648837. The next prime is 12665648867. The reversal of 12665648858 is 85884656621.

It is a junction number, because it is equal to n+sod(n) for n = 12665648797 and 12665648806.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2758310 + ... + 2762897.

It is an arithmetic number, because the mean of its divisors is an integer number (1258835424).

Almost surely, 2^12665648858 is an apocalyptic number.

12665648858 is a deficient number, since it is larger than the sum of its proper divisors (7475717926).

12665648858 is a wasteful number, since it uses less digits than its factorization.

12665648858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521277.

The product of its digits is 22118400, while the sum is 59.

The spelling of 12665648858 in words is "twelve billion, six hundred sixty-five million, six hundred forty-eight thousand, eight hundred fifty-eight".