11660555516511 has 32 divisors (see below), whose sum is σ = 18577761350400. Its totient is φ = 6421942177280.

The previous prime is 11660555516459. The next prime is 11660555516527. The reversal of 11660555516511 is 11561555506611.

It is a cyclic number.

It is not a de Polignac number, because 11660555516511 - 2¹⁰ = 11660555515487 is a prime.

It is a super-2 number, since 2×11660555516511² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11660555516531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 358351041 + ... + 358383578.

It is an arithmetic number, because the mean of its divisors is an integer number (580555042200).

Almost surely, 2^{11660555516511} is an apocalyptic number.

11660555516511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11660555516511 is a deficient number, since it is larger than the sum of its proper divisors (6917205833889).

11660555516511 is a wasteful number, since it uses less digits than its factorization.

11660555516511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716734679.

The product of its (nonzero) digits is 675000, while the sum is 48.

The spelling of 11660555516511 in words is "eleven trillion, six hundred sixty billion, five hundred fifty-five million, five hundred sixteen thousand, five hundred eleven".