266206 has 4 divisors (see below), whose sum is σ = 399312. Its totient is φ = 133102.

The previous prime is 266183. The next prime is 266221. The reversal of 266206 is 602662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 602662 = 2 ⋅301331.

It is a congruent number.

It is an unprimeable number.

266206 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66550 + ... + 66553.

It is an arithmetic number, because the mean of its divisors is an integer number (99828).

2²⁶⁶²⁰⁶ is an apocalyptic number.

266206 is a deficient number, since it is larger than the sum of its proper divisors (133106).

266206 is a wasteful number, since it uses less digits than its factorization.

266206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133105.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 266206 is about 515.9515481128. The cubic root of 266206 is about 64.3288735458.

Adding to 266206 its reverse (602662), we get a palindrome (868868).

The spelling of 266206 in words is "two hundred sixty-six thousand, two hundred six".