6551882081656 has 16 divisors (see below), whose sum is σ = 12294906521400. Its totient is φ = 3273240342624.

The previous prime is 6551882081623. The next prime is 6551882081669. The reversal of 6551882081656 is 6561802881556.

It is a junction number, because it is equal to n+sod(n) for n = 6551882081594 and 6551882081603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337576966 + ... + 337596373.

Almost surely, 2^{6551882081656} is an apocalyptic number.

It is an amenable number.

6551882081656 is a deficient number, since it is larger than the sum of its proper divisors (5743024439744).

6551882081656 is a wasteful number, since it uses less digits than its factorization.

6551882081656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675174558 (or 675174554 counting only the distinct ones).

The product of its (nonzero) digits is 27648000, while the sum is 61.

The spelling of 6551882081656 in words is "six trillion, five hundred fifty-one billion, eight hundred eighty-two million, eighty-one thousand, six hundred fifty-six".