680781366 has 12 divisors (see below), whose sum is σ = 1475026332. Its totient is φ = 226927116.

The previous prime is 680781349. The next prime is 680781373. The reversal of 680781366 is 663187086.

680781366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18910576 + ... + 18910611.

It is an arithmetic number, because the mean of its divisors is an integer number (122918861).

Almost surely, 2^680781366 is an apocalyptic number.

680781366 is an abundant number, since it is smaller than the sum of its proper divisors (794244966).

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

680781366 is a wasteful number, since it uses less digits than its factorization.

680781366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37821195 (or 37821192 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 680781366 is about 26091.7873285829. The cubic root of 680781366 is about 879.7026224872.

The spelling of 680781366 in words is "six hundred eighty million, seven hundred eighty-one thousand, three hundred sixty-six".