680810786 has 8 divisors (see below), whose sum is σ = 1056430620. Its totient is φ = 328667248.

The previous prime is 680810777. The next prime is 680810791. The reversal of 680810786 is 687018086.

It can be written as a sum of positive squares in 2 ways, for example, as 591413761 + 89397025 = 24319^2 + 9455^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5869001 + ... + 5869116.

Almost surely, 2^680810786 is an apocalyptic number.

680810786 is a deficient number, since it is larger than the sum of its proper divisors (375619834).

680810786 is a wasteful number, since it uses less digits than its factorization.

680810786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11738148.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 680810786 is about 26092.3511014243. The cubic root of 680810786 is about 879.7152944352.

The spelling of 680810786 in words is "six hundred eighty million, eight hundred ten thousand, seven hundred eighty-six".