55385666887 has 4 divisors (see below), whose sum is σ = 55444526136. Its totient is φ = 55326807640.

The previous prime is 55385666873. The next prime is 55385666891. The reversal of 55385666887 is 78866658355.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55385666887 - 2⁷ = 55385666759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55385666827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29428213 + ... + 29430094.

It is an arithmetic number, because the mean of its divisors is an integer number (13861131534).

Almost surely, 2^55385666887 is an apocalyptic number.

55385666887 is a deficient number, since it is larger than the sum of its proper divisors (58859249).

55385666887 is an equidigital number, since it uses as much as digits as its factorization.

55385666887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58859248.

The product of its digits is 290304000, while the sum is 67.

The spelling of 55385666887 in words is "fifty-five billion, three hundred eighty-five million, six hundred sixty-six thousand, eight hundred eighty-seven".