6856658 has 4 divisors (see below), whose sum is σ = 10284990. Its totient is φ = 3428328.

The previous prime is 6856643. The next prime is 6856669. The reversal of 6856658 is 8566586.

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

It can be written as a sum of positive squares in only one way, i.e., 3853369 + 3003289 = 1963^2 + 1733^2 .

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, 1714163 + ... + 1714166.

Almost surely, 2^6856658 is an apocalyptic number.

6856658 is a deficient number, since it is larger than the sum of its proper divisors (3428332).

6856658 is a wasteful number, since it uses less digits than its factorization.

6856658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3428331.

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

The square root of 6856658 is about 2618.5221022554. The cubic root of 6856658 is about 189.9783724228.

The spelling of 6856658 in words is "six million, eight hundred fifty-six thousand, six hundred fifty-eight".