680087218 has 16 divisors (see below), whose sum is σ = 1038951360. Its totient is φ = 333787216.

The previous prime is 680087209. The next prime is 680087249. The reversal of 680087218 is 812780086.

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 7 ways as a sum of consecutive naturals, for example, 83796 + ... + 91552.

It is an arithmetic number, because the mean of its divisors is an integer number (64934460).

Almost surely, 2^680087218 is an apocalyptic number.

680087218 is a deficient number, since it is larger than the sum of its proper divisors (358864142).

680087218 is a wasteful number, since it uses less digits than its factorization.

680087218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8561.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 680087218 is about 26078.4818960000. The cubic root of 680087218 is about 879.4035291666.

The spelling of 680087218 in words is "six hundred eighty million, eighty-seven thousand, two hundred eighteen".