11866580 has 24 divisors (see below), whose sum is σ = 27185760. Its totient is φ = 4315040.

The previous prime is 11866579. The next prime is 11866619. The reversal of 11866580 is 8566811.

It is a self number, because there is not a number n which added to its sum of digits gives 11866580.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26750 + ... + 27189.

It is an arithmetic number, because the mean of its divisors is an integer number (1132740).

Almost surely, 2^11866580 is an apocalyptic number.

11866580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11866580 is an abundant number, since it is smaller than the sum of its proper divisors (15319180).

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

11866580 is a wasteful number, since it uses less digits than its factorization.

11866580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53959 (or 53957 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 11866580 is about 3444.7902693778. The cubic root of 11866580 is about 228.0911967177.

The spelling of 11866580 in words is "eleven million, eight hundred sixty-six thousand, five hundred eighty".