266106191 has 8 divisors (see below), whose sum is σ = 301659120. Its totient is φ = 232708032.

The previous prime is 266106179. The next prime is 266106259. The reversal of 266106191 is 191601662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266106191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266106161) 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 in 7 ways as a sum of consecutive naturals, for example, 538430 + ... + 538923.

It is an arithmetic number, because the mean of its divisors is an integer number (37707390).

Almost surely, 2^266106191 is an apocalyptic number.

266106191 is a deficient number, since it is larger than the sum of its proper divisors (35552929).

266106191 is a wasteful number, since it uses less digits than its factorization.

266106191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077385.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 266106191 is about 16312.7615994350. The cubic root of 266106191 is about 643.2083290164.

The spelling of 266106191 in words is "two hundred sixty-six million, one hundred six thousand, one hundred ninety-one".