11665560 has 32 divisors (see below), whose sum is σ = 34997040. Its totient is φ = 3110784.

The previous prime is 11665529. The next prime is 11665561. The reversal of 11665560 is 6556611.

It is a super-3 number, since 3×11665560³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11665561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48487 + ... + 48726.

Almost surely, 2^11665560 is an apocalyptic number.

11665560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11665560 is an abundant number, since it is smaller than the sum of its proper divisors (23331480).

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

11665560 is a wasteful number, since it uses less digits than its factorization.

11665560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97227 (or 97223 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 11665560 is about 3415.4882520659. The cubic root of 11665560 is about 226.7958990079.

The spelling of 11665560 in words is "eleven million, six hundred sixty-five thousand, five hundred sixty".