6820216678 has 16 divisors (see below), whose sum is σ = 11204827200. Its totient is φ = 3087745000.

The previous prime is 6820216661. The next prime is 6820216727. The reversal of 6820216678 is 8766120286.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612028 + ... + 623071.

It is an arithmetic number, because the mean of its divisors is an integer number (700301700).

Almost surely, 2^6820216678 is an apocalyptic number.

6820216678 is a deficient number, since it is larger than the sum of its proper divisors (4384610522).

6820216678 is a wasteful number, since it uses less digits than its factorization.

6820216678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235363.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 6820216678 is about 82584.6031533724. The cubic root of 6820216678 is about 1896.4121282633.

The spelling of 6820216678 in words is "six billion, eight hundred twenty million, two hundred sixteen thousand, six hundred seventy-eight".