666135 has 24 divisors (see below), whose sum is σ = 1173744. Its totient is φ = 349440.

The previous prime is 666119. The next prime is 666139. The reversal of 666135 is 531666.

666135 = 363² + 364² + ... + 367².

It is not a de Polignac number, because 666135 - 2⁴ = 666119 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 666099 and 666108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5020 + ... + 5150.

It is an arithmetic number, because the mean of its divisors is an integer number (48906).

2⁶⁶⁶¹³⁵ is an apocalyptic number.

666135 is a deficient number, since it is larger than the sum of its proper divisors (507609).

666135 is a wasteful number, since it uses less digits than its factorization.

666135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 252 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 666135 is about 816.1709379781. The cubic root of 666135 is about 87.3348176168.

The spelling of 666135 in words is "six hundred sixty-six thousand, one hundred thirty-five".