666130 has 16 divisors (see below), whose sum is σ = 1240920. Its totient is φ = 257152.

The previous prime is 666119. The next prime is 666139. The reversal of 666130 is 31666.

It can be written as a sum of positive squares in 4 ways, for example, as 531441 + 134689 = 729^2 + 367^2 .

It is not an unprimeable number, because it can be changed into a prime (666139) 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 7 ways as a sum of consecutive naturals, for example, 859 + ... + 1438.

2⁶⁶⁶¹³⁰ is an apocalyptic number.

666130 is a deficient number, since it is larger than the sum of its proper divisors (574790).

666130 is a wasteful number, since it uses less digits than its factorization.

666130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 666130 is about 816.1678748885. The cubic root of 666130 is about 87.3345991050.

Adding to 666130 its reverse (31666), we get a palindrome (697796).

The spelling of 666130 in words is "six hundred sixty-six thousand, one hundred thirty".