5666115661648 has 80 divisors (see below), whose sum is σ = 12034039772160. Its totient is φ = 2568434969088.

The previous prime is 5666115661631. The next prime is 5666115661667. The reversal of 5666115661648 is 8461665116665.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13127286 + ... + 13552042.

It is an arithmetic number, because the mean of its divisors is an integer number (150425497152).

Almost surely, 2^{5666115661648} 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 5666115661648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6017019886080).

5666115661648 is an abundant number, since it is smaller than the sum of its proper divisors (6367924110512).

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

5666115661648 is a wasteful number, since it uses less digits than its factorization.

5666115661648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425924 (or 425918 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 61.

The spelling of 5666115661648 in words is "five trillion, six hundred sixty-six billion, one hundred fifteen million, six hundred sixty-one thousand, six hundred forty-eight".