266726473 has 4 divisors (see below), whose sum is σ = 287243908. Its totient is φ = 246209040.

The previous prime is 266726461. The next prime is 266726477. The reversal of 266726473 is 374627662.

It is a happy number.

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 69689104 + 197037369 = 8348^2 + 14037^2 .

It is a cyclic number.

It is not a de Polignac number, because 266726473 - 2⁵ = 266726441 is a prime.

It is a super-2 number, since 2×266726473² = 142286022798039458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266726477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10258698 + ... + 10258723.

It is an arithmetic number, because the mean of its divisors is an integer number (71810977).

Almost surely, 2^266726473 is an apocalyptic number.

It is an amenable number.

266726473 is a deficient number, since it is larger than the sum of its proper divisors (20517435).

266726473 is a wasteful number, since it uses less digits than its factorization.

266726473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20517434.

The product of its digits is 508032, while the sum is 43.

The square root of 266726473 is about 16331.7627033949. The cubic root of 266726473 is about 643.7077047903.

The spelling of 266726473 in words is "two hundred sixty-six million, seven hundred twenty-six thousand, four hundred seventy-three".