660141 has 12 divisors (see below), whose sum is σ = 977340. Its totient is φ = 429120.

The previous prime is 660137. The next prime is 660157. The reversal of 660141 is 141066.

660141 is a `hidden beast` number, since 660 + 1 + 4 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 324900 + 335241 = 570^2 + 579^2 .

It is not a de Polignac number, because 660141 - 2² = 660137 is a prime.

It is a super-2 number, since 2×660141² = 871572279762, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660131) 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, 526 + ... + 1263.

It is an arithmetic number, because the mean of its divisors is an integer number (81445).

2⁶⁶⁰¹⁴¹ is an apocalyptic number.

It is an amenable number.

660141 is a deficient number, since it is larger than the sum of its proper divisors (317199).

660141 is a wasteful number, since it uses less digits than its factorization.

660141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836 (or 1833 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 660141 is about 812.4906153304. The cubic root of 660141 is about 87.0720766160.

The spelling of 660141 in words is "six hundred sixty thousand, one hundred forty-one".