655558 has 4 divisors (see below), whose sum is σ = 983340. Its totient is φ = 327778.

The previous prime is 655547. The next prime is 655559. The reversal of 655558 is 855556.

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

It is a super-3 number, since 3×655558³ = 845190524562003336, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655559) by changing a digit.

655558 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 as a sum of consecutive naturals, namely, 163888 + ... + 163891.

It is an arithmetic number, because the mean of its divisors is an integer number (245835).

2⁶⁵⁵⁵⁵⁸ is an apocalyptic number.

655558 is a deficient number, since it is larger than the sum of its proper divisors (327782).

655558 is a wasteful number, since it uses less digits than its factorization.

655558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327781.

The product of its digits is 30000, while the sum is 34.

The square root of 655558 is about 809.6653629741. The cubic root of 655558 is about 86.8701104851.

The spelling of 655558 in words is "six hundred fifty-five thousand, five hundred fifty-eight".