6866855 has 4 divisors (see below), whose sum is σ = 8240232. Its totient is φ = 5493480.

The previous prime is 6866843. The next prime is 6866863. The reversal of 6866855 is 5586686.

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

It is not a de Polignac number, because 6866855 - 2⁶ = 6866791 is a prime.

It is a Duffinian number.

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 in 3 ways as a sum of consecutive naturals, for example, 686681 + ... + 686690.

It is an arithmetic number, because the mean of its divisors is an integer number (2060058).

Almost surely, 2^6866855 is an apocalyptic number.

6866855 is a deficient number, since it is larger than the sum of its proper divisors (1373377).

6866855 is a wasteful number, since it uses less digits than its factorization.

6866855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373376.

The product of its digits is 345600, while the sum is 44.

The square root of 6866855 is about 2620.4684695680. The cubic root of 6866855 is about 190.0725023395.

The spelling of 6866855 in words is "six million, eight hundred sixty-six thousand, eight hundred fifty-five".