11556666005 has 16 divisors (see below), whose sum is σ = 14109128640. Its totient is φ = 9084715392.

The previous prime is 11556665993. The next prime is 11556666007. The reversal of 11556666005 is 50066665511.

11556666005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11556666005 - 2⁸ = 11556665749 is a prime.

It is a super-2 number, since 2×11556666005² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11556666007) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 812162 + ... + 826268.

It is an arithmetic number, because the mean of its divisors is an integer number (881820540).

Almost surely, 2^11556666005 is an apocalyptic number.

It is an amenable number.

11556666005 is a deficient number, since it is larger than the sum of its proper divisors (2552462635).

11556666005 is a wasteful number, since it uses less digits than its factorization.

11556666005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16948.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 11556666005 in words is "eleven billion, five hundred fifty-six million, six hundred sixty-six thousand, five".