12665086416 has 60 divisors (see below), whose sum is σ = 35649604068. Its totient is φ = 4197284352.

The previous prime is 12665086403. The next prime is 12665086439. The reversal of 12665086416 is 61468056621.

12665086416 is a `hidden beast` number, since 12 + 66 + 508 + 64 + 16 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9604784016 + 3060302400 = 98004^2 + 55320^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229285 + ... + 279108.

Almost surely, 2^12665086416 is an apocalyptic number.

12665086416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12665086416 is an abundant number, since it is smaller than the sum of its proper divisors (22984517652).

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

12665086416 is a wasteful number, since it uses less digits than its factorization.

12665086416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508580 (or 508571 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 12665086416 in words is "twelve billion, six hundred sixty-five million, eighty-six thousand, four hundred sixteen".