12665212870 has 16 divisors (see below), whose sum is σ = 22861971360. Its totient is φ = 5051732224.

The previous prime is 12665212853. The next prime is 12665212909. The reversal of 12665212870 is 7821256621.

It is a congruent number.

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, 1790410 + ... + 1797469.

It is an arithmetic number, because the mean of its divisors is an integer number (1428873210).

Almost surely, 2^12665212870 is an apocalyptic number.

12665212870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12665212870 is a deficient number, since it is larger than the sum of its proper divisors (10196758490).

12665212870 is a wasteful number, since it uses less digits than its factorization.

12665212870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3588239.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 12665212870 in words is "twelve billion, six hundred sixty-five million, two hundred twelve thousand, eight hundred seventy".