6551515116566 has 32 divisors (see below), whose sum is σ = 11465571686400. Its totient is φ = 2806519323048.

The previous prime is 6551515116541. The next prime is 6551515116589. The reversal of 6551515116566 is 6656115151556.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649640 + ... + 3677643.

It is an arithmetic number, because the mean of its divisors is an integer number (358299115200).

Almost surely, 2^{6551515116566} is an apocalyptic number.

6551515116566 is a deficient number, since it is larger than the sum of its proper divisors (4914056569834).

6551515116566 is a wasteful number, since it uses less digits than its factorization.

6551515116566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329513 (or 4329499 counting only the distinct ones).

The product of its digits is 4050000, while the sum is 53.

The spelling of 6551515116566 in words is "six trillion, five hundred fifty-one billion, five hundred fifteen million, one hundred sixteen thousand, five hundred sixty-six".