655806 has 16 divisors (see below), whose sum is σ = 1357200. Its totient is φ = 211008.

The previous prime is 655757. The next prime is 655807. The reversal of 655806 is 608556.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 655806.

It is not an unprimeable number, because it can be changed into a prime (655807) by changing a digit.

655806 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1711 + ... + 2058.

It is an arithmetic number, because the mean of its divisors is an integer number (84825).

2⁶⁵⁵⁸⁰⁶ is an apocalyptic number.

655806 is an abundant number, since it is smaller than the sum of its proper divisors (701394).

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

655806 is a wasteful number, since it uses less digits than its factorization.

655806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3803.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 655806 is about 809.8184981834. The cubic root of 655806 is about 86.8810635314.

The spelling of 655806 in words is "six hundred fifty-five thousand, eight hundred six".