12665563354260 has 144 divisors (see below), whose sum is σ = 39758368890240. Its totient is φ = 3259812084480.

The previous prime is 12665563354217. The next prime is 12665563354403. The reversal of 12665563354260 is 6245336556621.

It is a happy number.

12665563354260 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 5 + 5 + 6 + 33 + 542 + 60 = 666.

12665563354260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12665563354197 and 12665563354206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13703919 + ... + 14598921.

It is an arithmetic number, because the mean of its divisors is an integer number (276099783960).

Almost surely, 2^{12665563354260} is an apocalyptic number.

12665563354260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12665563354260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19879184445120).

12665563354260 is an abundant number, since it is smaller than the sum of its proper divisors (27092805535980).

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

12665563354260 is a wasteful number, since it uses less digits than its factorization.

12665563354260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897758 (or 897753 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 54.

The spelling of 12665563354260 in words is "twelve trillion, six hundred sixty-five billion, five hundred sixty-three million, three hundred fifty-four thousand, two hundred sixty".