266148921 has 16 divisors (see below), whose sum is σ = 374918400. Its totient is φ = 167666688.

The previous prime is 266148877. The next prime is 266148929. The reversal of 266148921 is 129841662.

It is not a de Polignac number, because 266148921 - 2⁷ = 266148793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266148921.

It is not an unprimeable number, because it can be changed into a prime (266148929) 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, 28456 + ... + 36633.

It is an arithmetic number, because the mean of its divisors is an integer number (23432400).

Almost surely, 2^266148921 is an apocalyptic number.

It is an amenable number.

266148921 is a deficient number, since it is larger than the sum of its proper divisors (108769479).

266148921 is a wasteful number, since it uses less digits than its factorization.

266148921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65168.

The product of its digits is 41472, while the sum is 39.

The square root of 266148921 is about 16314.0712576598. The cubic root of 266148921 is about 643.2427548983.

The spelling of 266148921 in words is "two hundred sixty-six million, one hundred forty-eight thousand, nine hundred twenty-one".