6686807420 has 12 divisors (see below), whose sum is σ = 14042295624. Its totient is φ = 2674722960.

The previous prime is 6686807419. The next prime is 6686807437. The reversal of 6686807420 is 247086866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167170166 + ... + 167170205.

It is an arithmetic number, because the mean of its divisors is an integer number (1170191302).

Almost surely, 2^6686807420 is an apocalyptic number.

It is an amenable number.

6686807420 is an abundant number, since it is smaller than the sum of its proper divisors (7355488204).

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

6686807420 is a wasteful number, since it uses less digits than its factorization.

6686807420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334340380 (or 334340378 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 6686807420 is about 81772.9015016588. The cubic root of 6686807420 is about 1883.9654697566.

The spelling of 6686807420 in words is "six billion, six hundred eighty-six million, eight hundred seven thousand, four hundred twenty".