55666575804 has 96 divisors (see below), whose sum is σ = 150065104896. Its totient is φ = 15731536320.

The previous prime is 55666575799. The next prime is 55666575817. The reversal of 55666575804 is 40857566655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6206227 + ... + 6215189.

It is an arithmetic number, because the mean of its divisors is an integer number (1563178176).

Almost surely, 2^55666575804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55666575804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75032552448).

55666575804 is an abundant number, since it is smaller than the sum of its proper divisors (94398529092).

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

55666575804 is a wasteful number, since it uses less digits than its factorization.

55666575804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9775 (or 9773 counting only the distinct ones).

The product of its (nonzero) digits is 30240000, while the sum is 57.

The spelling of 55666575804 in words is "fifty-five billion, six hundred sixty-six million, five hundred seventy-five thousand, eight hundred four".