55555678 has 8 divisors (see below), whose sum is σ = 83373840. Its totient is φ = 27764400.

The previous prime is 55555651. The next prime is 55555679. The reversal of 55555678 is 87655555.

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

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343 + ... + 10546.

It is an arithmetic number, because the mean of its divisors is an integer number (10421730).

Almost surely, 2^55555678 is an apocalyptic number.

55555678 is a deficient number, since it is larger than the sum of its proper divisors (27818162).

55555678 is a wasteful number, since it uses less digits than its factorization.

55555678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13442.

The product of its digits is 1050000, while the sum is 46.

The square root of 55555678 is about 7453.5681388178. The cubic root of 55555678 is about 381.5716945120.

The spelling of 55555678 in words is "fifty-five million, five hundred fifty-five thousand, six hundred seventy-eight".