12662117585 has 8 divisors (see below), whose sum is σ = 16363352040. Its totient is φ = 9350486784.

The previous prime is 12662117557. The next prime is 12662117603. The reversal of 12662117585 is 58571126621.

12662117585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2854978624 + 9807138961 = 53432^2 + 99031^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12662117585 - 2¹⁸ = 12661855441 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97400840 + ... + 97400969.

It is an arithmetic number, because the mean of its divisors is an integer number (2045419005).

Almost surely, 2^12662117585 is an apocalyptic number.

It is an amenable number.

12662117585 is a deficient number, since it is larger than the sum of its proper divisors (3701234455).

12662117585 is a wasteful number, since it uses less digits than its factorization.

12662117585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194801827.

The product of its digits is 201600, while the sum is 44.

The spelling of 12662117585 in words is "twelve billion, six hundred sixty-two million, one hundred seventeen thousand, five hundred eighty-five".