6556005666511 has 8 divisors (see below), whose sum is σ = 7492596122624. Its totient is φ = 5619419764920.

The previous prime is 6556005666433. The next prime is 6556005666521. The reversal of 6556005666511 is 1156665006556.

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 6556005666511 - 2¹⁹ = 6556005142223 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 (6556005666521) 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, 2901706 + ... + 4640248.

It is an arithmetic number, because the mean of its divisors is an integer number (936574515328).

Almost surely, 2^{6556005666511} is an apocalyptic number.

6556005666511 is a deficient number, since it is larger than the sum of its proper divisors (936590456113).

6556005666511 is a wasteful number, since it uses less digits than its factorization.

6556005666511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277261.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 6556005666511 in words is "six trillion, five hundred fifty-six billion, five million, six hundred sixty-six thousand, five hundred eleven".