11666678 has 8 divisors (see below), whose sum is σ = 17830368. Its totient is φ = 5723224.

The previous prime is 11666663. The next prime is 11666689. The reversal of 11666678 is 87666611.

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

It is a super-2 number, since 2×11666678² = 272222751111368, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 10.

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 3 ways as a sum of consecutive naturals, for example, 54926 + ... + 55137.

It is an arithmetic number, because the mean of its divisors is an integer number (2228796).

Almost surely, 2^11666678 is an apocalyptic number.

11666678 is a deficient number, since it is larger than the sum of its proper divisors (6163690).

11666678 is a wasteful number, since it uses less digits than its factorization.

11666678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110118.

The product of its digits is 72576, while the sum is 41.

The square root of 11666678 is about 3415.6519143496. The cubic root of 11666678 is about 226.8031439727.

The spelling of 11666678 in words is "eleven million, six hundred sixty-six thousand, six hundred seventy-eight".