6782556647 has 8 divisors (see below), whose sum is σ = 6811612800. Its totient is φ = 6753521664.

The previous prime is 6782556631. The next prime is 6782556659. The reversal of 6782556647 is 7466552876.

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 6782556647 - 2⁴ = 6782556631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6782556592 and 6782556601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6782556607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1189379 + ... + 1195067.

It is an arithmetic number, because the mean of its divisors is an integer number (851451600).

Almost surely, 2^6782556647 is an apocalyptic number.

6782556647 is a deficient number, since it is larger than the sum of its proper divisors (29056153).

6782556647 is a wasteful number, since it uses less digits than its factorization.

6782556647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10585.

The product of its digits is 16934400, while the sum is 56.

The square root of 6782556647 is about 82356.2787345324. The cubic root of 6782556647 is about 1892.9151328881.

The spelling of 6782556647 in words is "six billion, seven hundred eighty-two million, five hundred fifty-six thousand, six hundred forty-seven".