266137253 has 4 divisors (see below), whose sum is σ = 266199468. Its totient is φ = 266075040.

The previous prime is 266137247. The next prime is 266137283. The reversal of 266137253 is 352731662.

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 72982849 + 193154404 = 8543^2 + 13898^2 .

It is a cyclic number.

It is not a de Polignac number, because 266137253 - 2¹² = 266133157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266137213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24176 + ... + 33417.

It is an arithmetic number, because the mean of its divisors is an integer number (66549867).

Almost surely, 2^266137253 is an apocalyptic number.

It is an amenable number.

266137253 is a deficient number, since it is larger than the sum of its proper divisors (62215).

266137253 is an equidigital number, since it uses as much as digits as its factorization.

266137253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62214.

The product of its digits is 45360, while the sum is 35.

The square root of 266137253 is about 16313.7136483389. The cubic root of 266137253 is about 643.2333548149.

The spelling of 266137253 in words is "two hundred sixty-six million, one hundred thirty-seven thousand, two hundred fifty-three".