11656656166487 has 8 divisors (see below), whose sum is σ = 11670547547520. Its totient is φ = 11642765676640.

The previous prime is 11656656166457. The next prime is 11656656166499. The reversal of 11656656166487 is 78466165665611.

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 11656656166487 - 2⁶ = 11656656166423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11656656166417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28090937 + ... + 28502877.

It is an arithmetic number, because the mean of its divisors is an integer number (1458818443440).

Almost surely, 2^{11656656166487} is an apocalyptic number.

11656656166487 is a deficient number, since it is larger than the sum of its proper divisors (13891381033).

11656656166487 is an equidigital number, since it uses as much as digits as its factorization.

11656656166487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445593.

The product of its digits is 261273600, while the sum is 68.

The spelling of 11656656166487 in words is "eleven trillion, six hundred fifty-six billion, six hundred fifty-six million, one hundred sixty-six thousand, four hundred eighty-seven".