550665 has 16 divisors (see below), whose sum is σ = 979200. Its totient is φ = 293616.

The previous prime is 550663. The next prime is 550679. The reversal of 550665 is 566055.

It is not a de Polignac number, because 550665 - 2¹ = 550663 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (550661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1905 + ... + 2174.

It is an arithmetic number, because the mean of its divisors is an integer number (61200).

2⁵⁵⁰⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

550665 is a deficient number, since it is larger than the sum of its proper divisors (428535).

550665 is a wasteful number, since it uses less digits than its factorization.

550665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4093 (or 4087 counting only the distinct ones).

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

The square root of 550665 is about 742.0680561781. The cubic root of 550665 is about 81.9651348905.

The spelling of 550665 in words is "five hundred fifty thousand, six hundred sixty-five".