266404 has 6 divisors (see below), whose sum is σ = 466214. Its totient is φ = 133200.

The previous prime is 266401. The next prime is 266411. The reversal of 266404 is 404662.

It can be written as a sum of positive squares in only one way, i.e., 252004 + 14400 = 502^2 + 120^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33297 + ... + 33304.

2²⁶⁶⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

266404 is a deficient number, since it is larger than the sum of its proper divisors (199810).

266404 is a wasteful number, since it uses less digits than its factorization.

266404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66605 (or 66603 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 266404 is about 516.1433909293. The cubic root of 266404 is about 64.3448185412.

The spelling of 266404 in words is "two hundred sixty-six thousand, four hundred four".