12665036616 has 16 divisors (see below), whose sum is σ = 31662591600. Its totient is φ = 4221678864.

The previous prime is 12665036603. The next prime is 12665036677. The reversal of 12665036616 is 61663056621.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263854906 + ... + 263854953.

It is an arithmetic number, because the mean of its divisors is an integer number (1978911975).

Almost surely, 2^12665036616 is an apocalyptic number.

It is an amenable number.

12665036616 is an abundant number, since it is smaller than the sum of its proper divisors (18997554984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12665036616 is a wasteful number, since it uses less digits than its factorization.

12665036616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527709868 (or 527709864 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 12665036616 in words is "twelve billion, six hundred sixty-five million, thirty-six thousand, six hundred sixteen".