6686646850 has 48 divisors (see below), whose sum is σ = 13434765120. Its totient is φ = 2461377600.

The previous prime is 6686646829. The next prime is 6686646853. The reversal of 6686646850 is 586466866.

It is a super-2 number, since 2×6686646850² = 89422492193229845000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6686646791 and 6686646800.

It is not an unprimeable number, because it can be changed into a prime (6686646853) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 199611 + ... + 230689.

It is an arithmetic number, because the mean of its divisors is an integer number (279890940).

Almost surely, 2^6686646850 is an apocalyptic number.

6686646850 is an abundant number, since it is smaller than the sum of its proper divisors (6748118270).

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

6686646850 is a wasteful number, since it uses less digits than its factorization.

6686646850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31435 (or 31430 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 55.

The square root of 6686646850 is about 81771.9196912975. The cubic root of 6686646850 is about 1883.9503897771.

The spelling of 6686646850 in words is "six billion, six hundred eighty-six million, six hundred forty-six thousand, eight hundred fifty".