266105189 has 16 divisors (see below), whose sum is σ = 315168000. Its totient is φ = 219832704.

The previous prime is 266105141. The next prime is 266105197. The reversal of 266105189 is 981501662.

It is a de Polignac number, because none of the positive numbers 2^k-266105189 is a prime.

It is a super-2 number, since 2×266105189² = 141623943225451442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266105689) 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, 189512 + ... + 190910.

It is an arithmetic number, because the mean of its divisors is an integer number (19698000).

Almost surely, 2^266105189 is an apocalyptic number.

266105189 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

266105189 is a deficient number, since it is larger than the sum of its proper divisors (49062811).

266105189 is a wasteful number, since it uses less digits than its factorization.

266105189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 266105189 is about 16312.7308872549. The cubic root of 266105189 is about 643.2075217001.

The spelling of 266105189 in words is "two hundred sixty-six million, one hundred five thousand, one hundred eighty-nine".