266640105 has 16 divisors (see below), whose sum is σ = 426870720. Its totient is φ = 142125888.

The previous prime is 266640047. The next prime is 266640107. The reversal of 266640105 is 501046662.

It is not a de Polignac number, because 266640105 - 2¹⁰ = 266639081 is a prime.

It is a super-2 number, since 2×266640105² = 142193891188822050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266640107) 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 15 ways as a sum of consecutive naturals, for example, 29011 + ... + 37079.

It is an arithmetic number, because the mean of its divisors is an integer number (26679420).

Almost surely, 2^266640105 is an apocalyptic number.

It is an amenable number.

266640105 is a deficient number, since it is larger than the sum of its proper divisors (160230615).

266640105 is a wasteful number, since it uses less digits than its factorization.

266640105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10280.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 266640105 is about 16329.1183166759. The cubic root of 266640105 is about 643.6382181882.

Adding to 266640105 its reverse (501046662), we get a palindrome (767686767).

The spelling of 266640105 in words is "two hundred sixty-six million, six hundred forty thousand, one hundred five".