6918866 has 4 divisors (see below), whose sum is σ = 10378302. Its totient is φ = 3459432.

The previous prime is 6918853. The next prime is 6918943. The reversal of 6918866 is 6688196.

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., 6911641 + 7225 = 2629^2 + 85^2 .

It is a zygodrome in base 3.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1729715 + ... + 1729718.

Almost surely, 2^6918866 is an apocalyptic number.

6918866 is a deficient number, since it is larger than the sum of its proper divisors (3459436).

6918866 is a wasteful number, since it uses less digits than its factorization.

6918866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459435.

The product of its digits is 124416, while the sum is 44.

The square root of 6918866 is about 2630.3737377034. The cubic root of 6918866 is about 190.5511788332.

The spelling of 6918866 in words is "six million, nine hundred eighteen thousand, eight hundred sixty-six".