660105 has 12 divisors (see below), whose sum is σ = 1144260. Its totient is φ = 352032.

The previous prime is 660103. The next prime is 660119. The reversal of 660105 is 501066.

660105 is a `hidden beast` number, since 660 + 1 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 331776 + 328329 = 576^2 + 573^2 .

It is not a de Polignac number, because 660105 - 2¹ = 660103 is a prime.

It is a super-2 number, since 2×660105² = 871477222050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (660103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7290 + ... + 7379.

It is an arithmetic number, because the mean of its divisors is an integer number (95355).

2⁶⁶⁰¹⁰⁵ is an apocalyptic number.

It is an amenable number.

660105 is a deficient number, since it is larger than the sum of its proper divisors (484155).

660105 is a wasteful number, since it uses less digits than its factorization.

660105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14680 (or 14677 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 660105 is about 812.4684609263. The cubic root of 660105 is about 87.0704937967.

The spelling of 660105 in words is "six hundred sixty thousand, one hundred five".