Search a number
-
+
666125 = 53732
BaseRepresentation
bin10100010101000001101
31020211202022
42202220031
5132304000
622135525
75443025
oct2425015
91224668
10666125
11415519
122815a5
131a4275
14134a85
15d2585
hexa2a0d

666125 has 12 divisors (see below), whose sum is σ = 842868. Its totient is φ = 525600.

The previous prime is 666119. The next prime is 666139. The reversal of 666125 is 521666.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 174724 + 491401 = 418^2 + 701^2 .

It is not a de Polignac number, because 666125 - 24 = 666109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 666094 and 666103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9089 + ... + 9161.

It is an arithmetic number, because the mean of its divisors is an integer number (70239).

2666125 is an apocalyptic number.

It is an amenable number.

666125 is a deficient number, since it is larger than the sum of its proper divisors (176743).

666125 is an frugal number, since it uses more digits than its factorization.

666125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 78 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 666125 is about 816.1648117874. The cubic root of 666125 is about 87.3343805920.

The spelling of 666125 in words is "six hundred sixty-six thousand, one hundred twenty-five".

Divisors: 1 5 25 73 125 365 1825 5329 9125 26645 133225 666125