655506 has 32 divisors (see below), whose sum is σ = 1488000. Its totient is φ = 213840.

The previous prime is 655489. The next prime is 655507. The reversal of 655506 is 605556.

655506 is a `hidden beast` number, since 655 + 5 + 0 + 6 = 666.

655506 is nontrivially palindromic in base 7.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 655506.

It is not an unprimeable number, because it can be changed into a prime (655507) by changing a digit.

655506 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3195 + ... + 3393.

It is an arithmetic number, because the mean of its divisors is an integer number (46500).

2⁶⁵⁵⁵⁰⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (744000).

655506 is an abundant number, since it is smaller than the sum of its proper divisors (832494).

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

655506 is a wasteful number, since it uses less digits than its factorization.

655506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 655506 is about 809.6332503053. The cubic root of 655506 is about 86.8678135283.

It can be divided in two parts, 65550 and 6, that added together give a palindrome (65556).

The spelling of 655506 in words is "six hundred fifty-five thousand, five hundred six".