266661323 has 2 divisors, whose sum is σ = 266661324. Its totient is φ = 266661322.

The previous prime is 266661313. The next prime is 266661341. The reversal of 266661323 is 323166662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266661323 - 2⁶ = 266661259 is a prime.

It is a super-2 number, since 2×266661323² = 142216522368220658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (266661313) 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 as a sum of consecutive naturals, namely, 133330661 + 133330662.

It is an arithmetic number, because the mean of its divisors is an integer number (133330662).

Almost surely, 2^266661323 is an apocalyptic number.

266661323 is a deficient number, since it is larger than the sum of its proper divisors (1).

266661323 is an equidigital number, since it uses as much as digits as its factorization.

266661323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 35.

The square root of 266661323 is about 16329.7680020262. The cubic root of 266661323 is about 643.6552903305.

The spelling of 266661323 in words is "two hundred sixty-six million, six hundred sixty-one thousand, three hundred twenty-three".