6858686020 has 36 divisors (see below), whose sum is σ = 15056719020. Its totient is φ = 2624188864.

The previous prime is 6858686017. The next prime is 6858686027. The reversal of 6858686020 is 206868586.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4171093056 + 2687592964 = 64584^2 + 51842^2 .

It is not an unprimeable number, because it can be changed into a prime (6858686027) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 313555 + ... + 334714.

It is an arithmetic number, because the mean of its divisors is an integer number (418242195).

Almost surely, 2^6858686020 is an apocalyptic number.

It is an amenable number.

6858686020 is an abundant number, since it is smaller than the sum of its proper divisors (8198033000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6858686020 is a wasteful number, since it uses less digits than its factorization.

6858686020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648324 (or 648299 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 49.

The square root of 6858686020 is about 82817.1843278918. The cubic root of 6858686020 is about 1899.9710078679.

The spelling of 6858686020 in words is "six billion, eight hundred fifty-eight million, six hundred eighty-six thousand, twenty".