11666859 has 8 divisors (see below), whose sum is σ = 15571920. Its totient is φ = 7769856.

The previous prime is 11666843. The next prime is 11666861. The reversal of 11666859 is 95866611.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11666859 - 2⁴ = 11666843 is a prime.

It is a super-3 number, since 3×11666859³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 11666859.

It is not an unprimeable number, because it can be changed into a prime (11666059) by changing a digit.

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, 3619 + ... + 6035.

It is an arithmetic number, because the mean of its divisors is an integer number (1946490).

Almost surely, 2^11666859 is an apocalyptic number.

11666859 is a deficient number, since it is larger than the sum of its proper divisors (3905061).

11666859 is a wasteful number, since it uses less digits than its factorization.

11666859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4029.

The product of its digits is 77760, while the sum is 42.

The square root of 11666859 is about 3415.6784099209. The cubic root of 11666859 is about 226.8043168618.

The spelling of 11666859 in words is "eleven million, six hundred sixty-six thousand, eight hundred fifty-nine".