6557966697556 has 12 divisors (see below), whose sum is σ = 11489740036992. Its totient is φ = 3275183829848.

The previous prime is 6557966697551. The next prime is 6557966697571.

6557966697556 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6557966697556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6557966697551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 949875850 + ... + 949882753.

It is an arithmetic number, because the mean of its divisors is an integer number (957478336416).

Almost surely, 2^{6557966697556} is an apocalyptic number.

It is an amenable number.

6557966697556 is a deficient number, since it is larger than the sum of its proper divisors (4931773339436).

6557966697556 is a wasteful number, since it uses less digits than its factorization.

6557966697556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899759470 (or 1899759468 counting only the distinct ones).

The product of its digits is 19289340000, while the sum is 82.

The spelling of 6557966697556 in words is "six trillion, five hundred fifty-seven billion, nine hundred sixty-six million, six hundred ninety-seven thousand, five hundred fifty-six".