56660009 has 8 divisors (see below), whose sum is σ = 64867200. Its totient is φ = 48481056.

The previous prime is 56660003. The next prime is 56660011. The reversal of 56660009 is 90006665.

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

It is a cyclic number.

It is not a de Polignac number, because 56660009 - 2²⁰ = 55611433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56660003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2564 + ... + 10949.

It is an arithmetic number, because the mean of its divisors is an integer number (8108400).

Almost surely, 2^56660009 is an apocalyptic number.

It is an amenable number.

56660009 is a deficient number, since it is larger than the sum of its proper divisors (8207191).

56660009 is a wasteful number, since it uses less digits than its factorization.

56660009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14119.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 56660009 is about 7527.2843044487. The cubic root of 56660009 is about 384.0834078982.

The spelling of 56660009 in words is "fifty-six million, six hundred sixty thousand, nine".