6557055002221 has 8 divisors (see below), whose sum is σ = 6565335294080. Its totient is φ = 6548775471792.

The previous prime is 6557055002213. The next prime is 6557055002237. The reversal of 6557055002221 is 1222005507556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6557055002221 - 2³ = 6557055002213 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 (6557055002261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18156811 + ... + 18514423.

It is an arithmetic number, because the mean of its divisors is an integer number (820666911760).

Almost surely, 2^{6557055002221} is an apocalyptic number.

It is an amenable number.

6557055002221 is a deficient number, since it is larger than the sum of its proper divisors (8280291859).

6557055002221 is a wasteful number, since it uses less digits than its factorization.

6557055002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380715.

The product of its (nonzero) digits is 210000, while the sum is 40.

The spelling of 6557055002221 in words is "six trillion, five hundred fifty-seven billion, fifty-five million, two thousand, two hundred twenty-one".