6818420686 has 16 divisors (see below), whose sum is σ = 12751332480. Its totient is φ = 2656527480.

The previous prime is 6818420669. The next prime is 6818420699. The reversal of 6818420686 is 6860248186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22137576 + ... + 22137883.

It is an arithmetic number, because the mean of its divisors is an integer number (796958280).

Almost surely, 2^6818420686 is an apocalyptic number.

6818420686 is a deficient number, since it is larger than the sum of its proper divisors (5932911794).

6818420686 is a wasteful number, since it uses less digits than its factorization.

6818420686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44275479.

The product of its (nonzero) digits is 884736, while the sum is 49.

The square root of 6818420686 is about 82573.7287882774. The cubic root of 6818420686 is about 1896.2456506580.

The spelling of 6818420686 in words is "six billion, eight hundred eighteen million, four hundred twenty thousand, six hundred eighty-six".