266553043 has 2 divisors, whose sum is σ = 266553044. Its totient is φ = 266553042.

The previous prime is 266553041. The next prime is 266553073. The reversal of 266553043 is 340355662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266553043 - 2¹ = 266553041 is a prime.

Together with 266553041, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (266553041) 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 as a sum of consecutive naturals, namely, 133276521 + 133276522.

It is an arithmetic number, because the mean of its divisors is an integer number (133276522).

Almost surely, 2^266553043 is an apocalyptic number.

266553043 is a deficient number, since it is larger than the sum of its proper divisors (1).

266553043 is an equidigital number, since it uses as much as digits as its factorization.

266553043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 34.

The square root of 266553043 is about 16326.4522478094. The cubic root of 266553043 is about 643.5681580465.

The spelling of 266553043 in words is "two hundred sixty-six million, five hundred fifty-three thousand, forty-three".