11320066566 has 24 divisors (see below), whose sum is σ = 25097203560. Its totient is φ = 3685602816.

The previous prime is 11320066529. The next prime is 11320066627. The reversal of 11320066566 is 66566002311.

11320066566 is a `hidden beast` number, since 1 + 1 + 32 + 0 + 0 + 66 + 566 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11320066566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7311931 + ... + 7313478.

It is an arithmetic number, because the mean of its divisors is an integer number (1045716815).

Almost surely, 2^11320066566 is an apocalyptic number.

11320066566 is an abundant number, since it is smaller than the sum of its proper divisors (13777136994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11320066566 is a wasteful number, since it uses less digits than its factorization.

11320066566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14625460 (or 14625457 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

Adding to 11320066566 its reverse (66566002311), we get a palindrome (77886068877).

The spelling of 11320066566 in words is "eleven billion, three hundred twenty million, sixty-six thousand, five hundred sixty-six".