686066204 has 24 divisors (see below), whose sum is σ = 1229973360. Its totient is φ = 334664064.

The previous prime is 686066203. The next prime is 686066221. The reversal of 686066204 is 402660686.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686066203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192422 + ... + 195954.

It is an arithmetic number, because the mean of its divisors is an integer number (51248890).

Almost surely, 2^686066204 is an apocalyptic number.

It is an amenable number.

686066204 is a deficient number, since it is larger than the sum of its proper divisors (543907156).

686066204 is a wasteful number, since it uses less digits than its factorization.

686066204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709 (or 4707 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 686066204 is about 26192.8655171594. The cubic root of 686066204 is about 881.9731053788.

The spelling of 686066204 in words is "six hundred eighty-six million, sixty-six thousand, two hundred four".