666226 has 12 divisors (see below), whose sum is σ = 1098846. Its totient is φ = 302720.

The previous prime is 666203. The next prime is 666229. The reversal of 666226 is 622666.

It can be written as a sum of positive squares in only one way, i.e., 421201 + 245025 = 649^2 + 495^2 .

It is a junction number, because it is equal to n+sod(n) for n = 666194 and 666203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1135 + ... + 1618.

2⁶⁶⁶²²⁶ is an apocalyptic number.

666226 is a deficient number, since it is larger than the sum of its proper divisors (432620).

666226 is a wasteful number, since it uses less digits than its factorization.

666226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777 (or 2766 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 666226 is about 816.2266841999. The cubic root of 666226 is about 87.3387943415.

The spelling of 666226 in words is "six hundred sixty-six thousand, two hundred twenty-six".