660055 has 12 divisors (see below), whose sum is σ = 871416. Its totient is φ = 479600.

The previous prime is 660053. The next prime is 660061. The reversal of 660055 is 550066.

It is not a de Polignac number, because 660055 - 2¹ = 660053 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660053) 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, 60 + ... + 1150.

It is an arithmetic number, because the mean of its divisors is an integer number (72618).

2⁶⁶⁰⁰⁵⁵ is an apocalyptic number.

660055 is a deficient number, since it is larger than the sum of its proper divisors (211361).

660055 is a wasteful number, since it uses less digits than its factorization.

660055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 660055 is about 812.4376899184. The cubic root of 660055 is about 87.0682953411.

Adding to 660055 its reverse (550066), we get a palindrome (1210121).

The spelling of 660055 in words is "six hundred sixty thousand, fifty-five".