6557220660500 has 96 divisors (see below), whose sum is σ = 14348783799168. Its totient is φ = 2617798176000.

The previous prime is 6557220660493. The next prime is 6557220660517. The reversal of 6557220660500 is 50660227556.

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, 1020258287 + ... + 1020264713.

It is an arithmetic number, because the mean of its divisors is an integer number (149466497908).

Almost surely, 2^{6557220660500} 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 6557220660500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7174391899584).

6557220660500 is an abundant number, since it is smaller than the sum of its proper divisors (7791563138668).

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

6557220660500 is a wasteful number, since it uses less digits than its factorization.

6557220660500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10090 (or 10078 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 44.

The spelling of 6557220660500 in words is "six trillion, five hundred fifty-seven billion, two hundred twenty million, six hundred sixty thousand, five hundred".