55666533018 has 16 divisors (see below), whose sum is σ = 112318315776. Its totient is φ = 18391302720.

The previous prime is 55666532953. The next prime is 55666533019. The reversal of 55666533018 is 81033566655.

It is not an unprimeable number, because it can be changed into a prime (55666533019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41051338 + ... + 41052693.

It is an arithmetic number, because the mean of its divisors is an integer number (7019894736).

Almost surely, 2^55666533018 is an apocalyptic number.

55666533018 is an abundant number, since it is smaller than the sum of its proper divisors (56651782758).

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

55666533018 is a wasteful number, since it uses less digits than its factorization.

55666533018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82104149.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 55666533018 in words is "fifty-five billion, six hundred sixty-six million, five hundred thirty-three thousand, eighteen".