6686291256 has 32 divisors (see below), whose sum is σ = 16719622800. Its totient is φ = 2228244480.

The previous prime is 6686291251. The next prime is 6686291279. The reversal of 6686291256 is 6521926866.

It is a junction number, because it is equal to n+sod(n) for n = 6686291199 and 6686291208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686291251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80760 + ... + 141048.

Almost surely, 2^6686291256 is an apocalyptic number.

It is an amenable number.

6686291256 is an abundant number, since it is smaller than the sum of its proper divisors (10033331544).

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

6686291256 is a wasteful number, since it uses less digits than its factorization.

6686291256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64919 (or 64915 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 51.

The square root of 6686291256 is about 81769.7453585371. The cubic root of 6686291256 is about 1883.9169932010.

The spelling of 6686291256 in words is "six billion, six hundred eighty-six million, two hundred ninety-one thousand, two hundred fifty-six".