12065660656 has 40 divisors (see below), whose sum is σ = 27638097120. Its totient is φ = 4992685824.

The previous prime is 12065660653. The next prime is 12065660713. The reversal of 12065660656 is 65606656021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12065660653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1854151 + ... + 1860646.

It is an arithmetic number, because the mean of its divisors is an integer number (690952428).

Almost surely, 2^12065660656 is an apocalyptic number.

12065660656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12065660656 is an abundant number, since it is smaller than the sum of its proper divisors (15572436464).

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

12065660656 is a wasteful number, since it uses less digits than its factorization.

12065660656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3714841 (or 3714835 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 12065660656 in words is "twelve billion, sixty-five million, six hundred sixty thousand, six hundred fifty-six".