6681567 has 8 divisors (see below), whose sum is σ = 9098496. Its totient is φ = 4359512.

The previous prime is 6681557. The next prime is 6681581. The reversal of 6681567 is 7651866.

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 6681567 - 2⁷ = 6681439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681547) 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, 23553 + ... + 23834.

It is an arithmetic number, because the mean of its divisors is an integer number (1137312).

Almost surely, 2^6681567 is an apocalyptic number.

6681567 is a deficient number, since it is larger than the sum of its proper divisors (2416929).

6681567 is a wasteful number, since it uses less digits than its factorization.

6681567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47437.

The product of its digits is 60480, while the sum is 39.

The square root of 6681567 is about 2584.8727241394. The cubic root of 6681567 is about 188.3473189464.

Subtracting 6681567 from its reverse (7651866), we obtain a cube (970299 = 99³).

The spelling of 6681567 in words is "six million, six hundred eighty-one thousand, five hundred sixty-seven".