11660011533 has 16 divisors (see below), whose sum is σ = 17276817600. Its totient is φ = 7772114160.

The previous prime is 11660011499. The next prime is 11660011579. The reversal of 11660011533 is 33511006611.

11660011533 is a `hidden beast` number, since 1 + 1 + 6 + 600 + 1 + 1 + 53 + 3 = 666.

It is not a de Polignac number, because 11660011533 - 2⁸ = 11660011277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 11660011497 and 11660011506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11660211533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160318 + ... + 221408.

It is an arithmetic number, because the mean of its divisors is an integer number (1079801100).

Almost surely, 2^11660011533 is an apocalyptic number.

It is an amenable number.

11660011533 is a deficient number, since it is larger than the sum of its proper divisors (5616806067).

11660011533 is an equidigital number, since it uses as much as digits as its factorization.

11660011533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68169 (or 68163 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The spelling of 11660011533 in words is "eleven billion, six hundred sixty million, eleven thousand, five hundred thirty-three".