686330568 has 192 divisors, whose sum is σ = 2372198400. Its totient is φ = 174061440.

The previous prime is 686330563. The next prime is 686330609. The reversal of 686330568 is 865033686.

686330568 is a `hidden beast` number, since 6 + 8 + 633 + 0 + 5 + 6 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (686330563) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 236953 + ... + 239831.

It is an arithmetic number, because the mean of its divisors is an integer number (12355200).

Almost surely, 2^686330568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686330568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1186099200).

686330568 is an abundant number, since it is smaller than the sum of its proper divisors (1685867832).

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

686330568 is a wasteful number, since it uses less digits than its factorization.

686330568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952 (or 2945 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 686330568 is about 26197.9115198139. The cubic root of 686330568 is about 882.0863753007.

The spelling of 686330568 in words is "six hundred eighty-six million, three hundred thirty thousand, five hundred sixty-eight".