680221790 has 8 divisors (see below), whose sum is σ = 1224399240. Its totient is φ = 272088712.

The previous prime is 680221781. The next prime is 680221807. The reversal of 680221790 is 97122086.

It is a happy number.

680221790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 680221790.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34011080 + ... + 34011099.

It is an arithmetic number, because the mean of its divisors is an integer number (153049905).

Almost surely, 2^680221790 is an apocalyptic number.

680221790 is a deficient number, since it is larger than the sum of its proper divisors (544177450).

680221790 is a wasteful number, since it uses less digits than its factorization.

680221790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68022186.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 680221790 is about 26081.0619032278. The cubic root of 680221790 is about 879.4615292209.

The spelling of 680221790 in words is "six hundred eighty million, two hundred twenty-one thousand, seven hundred ninety".