55666911 has 8 divisors (see below), whose sum is σ = 75268224. Its totient is φ = 36588440.

The previous prime is 55666909. The next prime is 55666939. The reversal of 55666911 is 11966655.

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 55666911 - 2¹ = 55666909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55666911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55666901) 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, 130461 + ... + 130886.

It is an arithmetic number, because the mean of its divisors is an integer number (9408528).

Almost surely, 2^55666911 is an apocalyptic number.

55666911 is a deficient number, since it is larger than the sum of its proper divisors (19601313).

55666911 is a wasteful number, since it uses less digits than its factorization.

55666911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261421.

The product of its digits is 48600, while the sum is 39.

The square root of 55666911 is about 7461.0261358609. The cubic root of 55666911 is about 381.8261843664.

The spelling of 55666911 in words is "fifty-five million, six hundred sixty-six thousand, nine hundred eleven".