6891678 has 12 divisors (see below), whose sum is σ = 14932008. Its totient is φ = 2297220.

The previous prime is 6891673. The next prime is 6891691. The reversal of 6891678 is 8761986.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6891673) 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 5 ways as a sum of consecutive naturals, for example, 191418 + ... + 191453.

It is an arithmetic number, because the mean of its divisors is an integer number (1244334).

Almost surely, 2^6891678 is an apocalyptic number.

6891678 is an abundant number, since it is smaller than the sum of its proper divisors (8040330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6891678 is a wasteful number, since it uses less digits than its factorization.

6891678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382879 (or 382876 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 6891678 is about 2625.2005637665. The cubic root of 6891678 is about 190.3012580011.

It can be divided in two parts, 6891 and 678, that added together give a square (7569 = 87²).

The spelling of 6891678 in words is "six million, eight hundred ninety-one thousand, six hundred seventy-eight".