6557106520671 has 16 divisors (see below), whose sum is σ = 10517664595200. Its totient is φ = 3549711800448.

The previous prime is 6557106520667. The next prime is 6557106520729. The reversal of 6557106520671 is 1760256017556.

It is not a de Polignac number, because 6557106520671 - 2² = 6557106520667 is a prime.

It is a super-2 number, since 2×6557106520671² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6557106520651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8216925066 + ... + 8216925863.

It is an arithmetic number, because the mean of its divisors is an integer number (657354037200).

Almost surely, 2^{6557106520671} is an apocalyptic number.

6557106520671 is a deficient number, since it is larger than the sum of its proper divisors (3960558074529).

6557106520671 is a wasteful number, since it uses less digits than its factorization.

6557106520671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16433850958.

The product of its (nonzero) digits is 2646000, while the sum is 51.

The spelling of 6557106520671 in words is "six trillion, five hundred fifty-seven billion, one hundred six million, five hundred twenty thousand, six hundred seventy-one".