680781378 has 8 divisors (see below), whose sum is σ = 1361562768. Its totient is φ = 226927124.

The previous prime is 680781377. The next prime is 680781383. The reversal of 680781378 is 873187086.

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

680781378 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (680781373) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 56731776 + ... + 56731787.

It is an arithmetic number, because the mean of its divisors is an integer number (170195346).

Almost surely, 2^680781378 is an apocalyptic number.

680781378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

680781378 is a wasteful number, since it uses less digits than its factorization.

680781378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113463568.

The product of its (nonzero) digits is 451584, while the sum is 48.

The square root of 680781378 is about 26091.7875585403. The cubic root of 680781378 is about 879.7026276559.

The spelling of 680781378 in words is "six hundred eighty million, seven hundred eighty-one thousand, three hundred seventy-eight".