266748243 has 4 divisors (see below), whose sum is σ = 355664328. Its totient is φ = 177832160.

The previous prime is 266748233. The next prime is 266748247. The reversal of 266748243 is 342847662.

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

It is a cyclic number.

It is not a de Polignac number, because 266748243 - 2¹⁴ = 266731859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 266748195 and 266748204.

It is not an unprimeable number, because it can be changed into a prime (266748247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44458038 + ... + 44458043.

It is an arithmetic number, because the mean of its divisors is an integer number (88916082).

Almost surely, 2^266748243 is an apocalyptic number.

266748243 is a deficient number, since it is larger than the sum of its proper divisors (88916085).

266748243 is an equidigital number, since it uses as much as digits as its factorization.

266748243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88916084.

The product of its digits is 387072, while the sum is 42.

The square root of 266748243 is about 16332.4291824578. The cubic root of 266748243 is about 643.7252172820.

The spelling of 266748243 in words is "two hundred sixty-six million, seven hundred forty-eight thousand, two hundred forty-three".