6557067212221 has 8 divisors (see below), whose sum is σ = 6942990038400. Its totient is φ = 6171168051648.

The previous prime is 6557067212191. The next prime is 6557067212243. The reversal of 6557067212221 is 1222127607556.

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 6557067212221 - 2⁷ = 6557067212093 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 (6557067212251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5344371 + ... + 6455728.

It is an arithmetic number, because the mean of its divisors is an integer number (867873754800).

Almost surely, 2^{6557067212221} is an apocalyptic number.

It is an amenable number.

6557067212221 is a deficient number, since it is larger than the sum of its proper divisors (385922826179).

6557067212221 is a wasteful number, since it uses less digits than its factorization.

6557067212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11832803.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 6557067212221 in words is "six trillion, five hundred fifty-seven billion, sixty-seven million, two hundred twelve thousand, two hundred twenty-one".