266105493 has 20 divisors (see below), whose sum is σ = 405979200. Its totient is φ = 173626632.

The previous prime is 266105491. The next prime is 266105509. The reversal of 266105493 is 394501662.

It is a happy number.

266105493 is a `hidden beast` number, since 2 + 66 + 105 + 493 = 666.

It is not a de Polignac number, because 266105493 - 2¹ = 266105491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266105491) 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 19 ways as a sum of consecutive naturals, for example, 31143 + ... + 38756.

It is an arithmetic number, because the mean of its divisors is an integer number (20298960).

Almost surely, 2^266105493 is an apocalyptic number.

It is an amenable number.

266105493 is a deficient number, since it is larger than the sum of its proper divisors (139873707).

266105493 is an equidigital number, since it uses as much as digits as its factorization.

266105493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69958 (or 69949 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 266105493 is about 16312.7402051280. The cubic root of 266105493 is about 643.2077666346.

The spelling of 266105493 in words is "two hundred sixty-six million, one hundred five thousand, four hundred ninety-three".