55678566 has 8 divisors (see below), whose sum is σ = 111357144. Its totient is φ = 18559520.

The previous prime is 55678559. The next prime is 55678589. The reversal of 55678566 is 66587655.

55678566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

55678566 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4639875 + ... + 4639886.

It is an arithmetic number, because the mean of its divisors is an integer number (13919643).

Almost surely, 2^55678566 is an apocalyptic number.

55678566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55678566 is a wasteful number, since it uses less digits than its factorization.

55678566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9279766.

The product of its digits is 1512000, while the sum is 48.

The square root of 55678566 is about 7461.8071537664. The cubic root of 55678566 is about 381.8528301994.

The spelling of 55678566 in words is "fifty-five million, six hundred seventy-eight thousand, five hundred sixty-six".