266197 has 6 divisors (see below), whose sum is σ = 276054. Its totient is φ = 256680.

The previous prime is 266183. The next prime is 266221. The reversal of 266197 is 791662.

It can be written as a sum of positive squares in only one way, i.e., 188356 + 77841 = 434^2 + 279^2 .

It is a de Polignac number, because none of the positive numbers 2^k-266197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an Ulam number.

It is a Duffinian number.

266197 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 823 + ... + 1099.

It is an arithmetic number, because the mean of its divisors is an integer number (46009).

2²⁶⁶¹⁹⁷ is an apocalyptic number.

It is an amenable number.

266197 is a deficient number, since it is larger than the sum of its proper divisors (9857).

266197 is an equidigital number, since it uses as much as digits as its factorization.

266197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 308 counting only the distinct ones).

The product of its digits is 4536, while the sum is 31.

The square root of 266197 is about 515.9428262899. The cubic root of 266197 is about 64.3281485854.

The spelling of 266197 in words is "two hundred sixty-six thousand, one hundred ninety-seven".