686913066 has 192 divisors, whose sum is σ = 1859020800. Its totient is φ = 182891520.

The previous prime is 686913047. The next prime is 686913083. The reversal of 686913066 is 660319686.

686913066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7081530 + ... + 7081626.

It is an arithmetic number, because the mean of its divisors is an integer number (9682400).

Almost surely, 2^686913066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686913066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (929510400).

686913066 is an abundant number, since it is smaller than the sum of its proper divisors (1172107734).

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

686913066 is a wasteful number, since it uses less digits than its factorization.

686913066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 686913066 is about 26209.0264222081. The cubic root of 686913066 is about 882.3358509333.

The spelling of 686913066 in words is "six hundred eighty-six million, nine hundred thirteen thousand, sixty-six".