266345 has 4 divisors (see below), whose sum is σ = 319620. Its totient is φ = 213072.

The previous prime is 266333. The next prime is 266351. The reversal of 266345 is 543662.

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

It can be written as a sum of positive squares in 2 ways, for example, as 53824 + 212521 = 232^2 + 461^2 .

It is a cyclic number.

It is not a de Polignac number, because 266345 - 2⁶ = 266281 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26630 + ... + 26639.

It is an arithmetic number, because the mean of its divisors is an integer number (79905).

2²⁶⁶³⁴⁵ is an apocalyptic number.

It is an amenable number.

266345 is a deficient number, since it is larger than the sum of its proper divisors (53275).

266345 is an equidigital number, since it uses as much as digits as its factorization.

266345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53274.

The product of its digits is 4320, while the sum is 26.

The square root of 266345 is about 516.0862331045. The cubic root of 266345 is about 64.3400680813.

The spelling of 266345 in words is "two hundred sixty-six thousand, three hundred forty-five".