680857255 has 8 divisors (see below), whose sum is σ = 879877152. Its totient is φ = 502786848.

The previous prime is 680857249. The next prime is 680857301. The reversal of 680857255 is 552758086.

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

It is a cyclic number.

It is not a de Polignac number, because 680857255 - 2⁵ = 680857223 is a prime.

It is a super-2 number, since 2×680857255² = 927133203372270050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5237299 + ... + 5237428.

It is an arithmetic number, because the mean of its divisors is an integer number (109984644).

Almost surely, 2^680857255 is an apocalyptic number.

680857255 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

680857255 is a deficient number, since it is larger than the sum of its proper divisors (199019897).

680857255 is a wasteful number, since it uses less digits than its factorization.

680857255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10474745.

The product of its (nonzero) digits is 672000, while the sum is 46.

The square root of 680857255 is about 26093.2415579207. The cubic root of 680857255 is about 879.7353090809.

The spelling of 680857255 in words is "six hundred eighty million, eight hundred fifty-seven thousand, two hundred fifty-five".