266445 has 24 divisors (see below), whose sum is σ = 479232. Its totient is φ = 136800.

The previous prime is 266417. The next prime is 266447. The reversal of 266445 is 544662.

It is a happy number.

It is not a de Polignac number, because 266445 - 2⁶ = 266381 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 6² + 4⁶ + 6² + 4⁹ + 5 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266447) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 1300 + ... + 1490.

It is an arithmetic number, because the mean of its divisors is an integer number (19968).

2²⁶⁶⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

266445 is a deficient number, since it is larger than the sum of its proper divisors (212787).

266445 is a wasteful number, since it uses less digits than its factorization.

266445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 230 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 266445 is about 516.1831070463. The cubic root of 266445 is about 64.3481192953.

The spelling of 266445 in words is "two hundred sixty-six thousand, four hundred forty-five".