680555 has 4 divisors (see below), whose sum is σ = 816672. Its totient is φ = 544440.

The previous prime is 680539. The next prime is 680567. The reversal of 680555 is 555086.

680555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 680555 - 2⁴ = 680539 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 680555.

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, 68051 + ... + 68060.

It is an arithmetic number, because the mean of its divisors is an integer number (204168).

2⁶⁸⁰⁵⁵⁵ is an apocalyptic number.

680555 is a deficient number, since it is larger than the sum of its proper divisors (136117).

680555 is a wasteful number, since it uses less digits than its factorization.

680555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136116.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 680555 is about 824.9575746667. The cubic root of 680555 is about 87.9605108636.

The spelling of 680555 in words is "six hundred eighty thousand, five hundred fifty-five".