555660 has 120 divisors (see below), whose sum is σ = 2032800. Its totient is φ = 127008.

The previous prime is 555637. The next prime is 555661. The reversal of 555660 is 66555.

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

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 105 × 63 × 84.

It is not an unprimeable number, because it can be changed into a prime (555661) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 79377 + ... + 79383.

It is an arithmetic number, because the mean of its divisors is an integer number (16940).

2⁵⁵⁵⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 555660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1016400).

555660 is an abundant number, since it is smaller than the sum of its proper divisors (1477140).

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

555660 is a wasteful number, since it uses less digits than its factorization.

555660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42 (or 17 counting only the distinct ones).

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

The square root of 555660 is about 745.4260526706. The cubic root of 555660 is about 82.2122204645.

The spelling of 555660 in words is "five hundred fifty-five thousand, six hundred sixty".