686266688 has 28 divisors (see below), whose sum is σ = 1381000032. Its totient is φ = 338298240.

The previous prime is 686266673. The next prime is 686266723. The reversal of 686266688 is 886662686.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 70970 + ... + 80057.

Almost surely, 2^686266688 is an apocalyptic number.

It is an amenable number.

686266688 is an abundant number, since it is smaller than the sum of its proper divisors (694733344).

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

686266688 is a wasteful number, since it uses less digits than its factorization.

686266688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151110 (or 151100 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 56.

The square root of 686266688 is about 26196.6923102899. The cubic root of 686266688 is about 882.0590078151.

The spelling of 686266688 in words is "six hundred eighty-six million, two hundred sixty-six thousand, six hundred eighty-eight".