655550 has 24 divisors (see below), whose sum is σ = 1394256. Its totient is φ = 224640.

The previous prime is 655547. The next prime is 655559. The reversal of 655550 is 55556.

It is a nialpdrome in base 10.

It is a congruent number.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 587 + ... + 1286.

It is an arithmetic number, because the mean of its divisors is an integer number (58094).

2⁶⁵⁵⁵⁵⁰ is an apocalyptic number.

655550 is an abundant number, since it is smaller than the sum of its proper divisors (738706).

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

655550 is a wasteful number, since it uses less digits than its factorization.

655550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892 (or 1887 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 655550 is about 809.6604226464. The cubic root of 655550 is about 86.8697571151.

The spelling of 655550 in words is "six hundred fifty-five thousand, five hundred fifty".