6678787 has 4 divisors (see below), whose sum is σ = 6909120. Its totient is φ = 6448456.

The previous prime is 6678779. The next prime is 6678797. The reversal of 6678787 is 7878766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6678787 - 2³ = 6678779 is a prime.

It is a Duffinian number.

6678787 is a modest number, since divided by 8787 gives 667 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 6678787.

It is not an unprimeable number, because it can be changed into a prime (6678767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115123 + ... + 115180.

It is an arithmetic number, because the mean of its divisors is an integer number (1727280).

Almost surely, 2^6678787 is an apocalyptic number.

6678787 is a deficient number, since it is larger than the sum of its proper divisors (230333).

6678787 is a wasteful number, since it uses less digits than its factorization.

6678787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230332.

The product of its digits is 790272, while the sum is 49.

The square root of 6678787 is about 2584.3349241149. The cubic root of 6678787 is about 188.3211934292.

The spelling of 6678787 in words is "six million, six hundred seventy-eight thousand, seven hundred eighty-seven".