266513 has 12 divisors (see below), whose sum is σ = 307440. Its totient is φ = 230256.

The previous prime is 266491. The next prime is 266521. The reversal of 266513 is 315662.

It is not a de Polignac number, because 266513 - 2⁶ = 266449 is a prime.

It is a Duffinian number.

266513 is a modest number, since divided by 513 gives 266 as remainder.

It is a nialpdrome in base 13 and base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 266513.

It is not an unprimeable number, because it can be changed into a prime (262513) 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 11 ways as a sum of consecutive naturals, for example, 3170 + ... + 3252.

It is an arithmetic number, because the mean of its divisors is an integer number (25620).

2²⁶⁶⁵¹³ is an apocalyptic number.

It is an amenable number.

266513 is a deficient number, since it is larger than the sum of its proper divisors (40927).

266513 is a wasteful number, since it uses less digits than its factorization.

266513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 115 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 266513 is about 516.2489709433. The cubic root of 266513 is about 64.3535929701.

The spelling of 266513 in words is "two hundred sixty-six thousand, five hundred thirteen".