266536 has 8 divisors (see below), whose sum is σ = 499770. Its totient is φ = 133264.

The previous prime is 266521. The next prime is 266549. The reversal of 266536 is 635662.

It can be written as a sum of positive squares in only one way, i.e., 244036 + 22500 = 494^2 + 150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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, 16651 + ... + 16666.

2²⁶⁶⁵³⁶ is an apocalyptic number.

It is an amenable number.

266536 is a deficient number, since it is larger than the sum of its proper divisors (233234).

266536 is a wasteful number, since it uses less digits than its factorization.

266536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33323 (or 33319 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

The square root of 266536 is about 516.2712465362. The cubic root of 266536 is about 64.3554441495.

It can be divided in two parts, 2665 and 36, that added together give a triangular number (2701 = T₇₃).

The spelling of 266536 in words is "two hundred sixty-six thousand, five hundred thirty-six".