266386 has 8 divisors (see below), whose sum is σ = 417024. Its totient is φ = 127380.

The previous prime is 266381. The next prime is 266401. The reversal of 266386 is 683662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (266381) 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 in 3 ways as a sum of consecutive naturals, for example, 2850 + ... + 2941.

It is an arithmetic number, because the mean of its divisors is an integer number (52128).

2²⁶⁶³⁸⁶ is an apocalyptic number.

266386 is a deficient number, since it is larger than the sum of its proper divisors (150638).

266386 is a wasteful number, since it uses less digits than its factorization.

266386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5816.

The product of its digits is 10368, while the sum is 31.

The square root of 266386 is about 516.1259536199. The cubic root of 266386 is about 64.3433693227.

The spelling of 266386 in words is "two hundred sixty-six thousand, three hundred eighty-six".