266305198 has 4 divisors (see below), whose sum is σ = 399457800. Its totient is φ = 133152598.

The previous prime is 266305163. The next prime is 266305211. The reversal of 266305198 is 891503662.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 266305198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66576298 + ... + 66576301.

It is an arithmetic number, because the mean of its divisors is an integer number (99864450).

Almost surely, 2^266305198 is an apocalyptic number.

266305198 is a deficient number, since it is larger than the sum of its proper divisors (133152602).

266305198 is a wasteful number, since it uses less digits than its factorization.

266305198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133152601.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 266305198 is about 16318.8601930404. The cubic root of 266305198 is about 643.3686297642.

The spelling of 266305198 in words is "two hundred sixty-six million, three hundred five thousand, one hundred ninety-eight".