266338 has 4 divisors (see below), whose sum is σ = 399510. Its totient is φ = 133168.

The previous prime is 266333. The next prime is 266351. The reversal of 266338 is 833662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 227529 + 38809 = 477^2 + 197^2 .

It is not an unprimeable number, because it can be changed into a prime (266333) 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, 66583 + ... + 66586.

2²⁶⁶³³⁸ is an apocalyptic number.

266338 is a deficient number, since it is larger than the sum of its proper divisors (133172).

266338 is a wasteful number, since it uses less digits than its factorization.

266338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133171.

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

The square root of 266338 is about 516.0794512476. The cubic root of 266338 is about 64.3395044208.

It can be divided in two parts, 2663 and 38, that added together give a triangular number (2701 = T₇₃).

The spelling of 266338 in words is "two hundred sixty-six thousand, three hundred thirty-eight".