6866679 has 4 divisors (see below), whose sum is σ = 9155576. Its totient is φ = 4577784.

The previous prime is 6866677. The next prime is 6866681. The reversal of 6866679 is 9766686.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (6866677) and next prime (6866681).

It is not a de Polignac number, because 6866679 - 2¹ = 6866677 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6866677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1144444 + ... + 1144449.

It is an arithmetic number, because the mean of its divisors is an integer number (2288894).

Almost surely, 2^6866679 is an apocalyptic number.

6866679 is a deficient number, since it is larger than the sum of its proper divisors (2288897).

6866679 is a wasteful number, since it uses less digits than its factorization.

6866679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288896.

The product of its digits is 653184, while the sum is 48.

The square root of 6866679 is about 2620.4348875711. The cubic root of 6866679 is about 190.0708784497.

The spelling of 6866679 in words is "six million, eight hundred sixty-six thousand, six hundred seventy-nine".