686616220300 has 36 divisors (see below), whose sum is σ = 1490220151056. Its totient is φ = 274598017600.

The previous prime is 686616220253. The next prime is 686616220307. The reversal of 686616220300 is 3022616686.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (686616220307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33736 + ... + 1172335.

It is an arithmetic number, because the mean of its divisors is an integer number (41395004196).

Almost surely, 2^686616220300 is an apocalyptic number.

It is an amenable number.

686616220300 is an abundant number, since it is smaller than the sum of its proper divisors (803603930756).

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

686616220300 is a wasteful number, since it uses less digits than its factorization.

686616220300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211778 (or 1211771 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

Adding to 686616220300 its reverse (3022616686), we get a palindrome (689638836986).

The spelling of 686616220300 in words is "six hundred eighty-six billion, six hundred sixteen million, two hundred twenty thousand, three hundred".