6787678 has 4 divisors (see below), whose sum is σ = 10181520. Its totient is φ = 3393838.

The previous prime is 6787663. The next prime is 6787699. The reversal of 6787678 is 8767876.

6787678 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1696918 + ... + 1696921.

It is an arithmetic number, because the mean of its divisors is an integer number (2545380).

Almost surely, 2^6787678 is an apocalyptic number.

6787678 is a deficient number, since it is larger than the sum of its proper divisors (3393842).

6787678 is a wasteful number, since it uses less digits than its factorization.

6787678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3393841.

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

The square root of 6787678 is about 2605.3172551534. The cubic root of 6787678 is about 189.3391445295.

The spelling of 6787678 in words is "six million, seven hundred eighty-seven thousand, six hundred seventy-eight".