266872 has 8 divisors (see below), whose sum is σ = 500400. Its totient is φ = 133432.

The previous prime is 266867. The next prime is 266891. The reversal of 266872 is 278662.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 16672 + ... + 16687.

It is an arithmetic number, because the mean of its divisors is an integer number (62550).

2²⁶⁶⁸⁷² is an apocalyptic number.

It is an amenable number.

266872 is a deficient number, since it is larger than the sum of its proper divisors (233528).

266872 is a wasteful number, since it uses less digits than its factorization.

266872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33365 (or 33361 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 266872 is about 516.5965543826. The cubic root of 266872 is about 64.3824753314.

The spelling of 266872 in words is "two hundred sixty-six thousand, eight hundred seventy-two".