686770064 has 20 divisors (see below), whose sum is σ = 1388470656. Its totient is φ = 328455072.

The previous prime is 686770009. The next prime is 686770069. The reversal of 686770064 is 460077686.

686770064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 686769997 and 686770024.

It is not an unprimeable number, because it can be changed into a prime (686770069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932744 + ... + 933479.

Almost surely, 2^686770064 is an apocalyptic number.

It is an amenable number.

686770064 is an abundant number, since it is smaller than the sum of its proper divisors (701700592).

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

686770064 is a wasteful number, since it uses less digits than its factorization.

686770064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866254 (or 1866248 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 686770064 is about 26206.2981742939. The cubic root of 686770064 is about 882.2746182706.

The spelling of 686770064 in words is "six hundred eighty-six million, seven hundred seventy thousand, sixty-four".