266168197 has 2 divisors, whose sum is σ = 266168198. Its totient is φ = 266168196.

The previous prime is 266168183. The next prime is 266168219. The reversal of 266168197 is 791861662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237961476 + 28206721 = 15426^2 + 5311^2 .

It is a cyclic number.

It is not a de Polignac number, because 266168197 - 2²³ = 257779589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266168797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133084098 + 133084099.

It is an arithmetic number, because the mean of its divisors is an integer number (133084099).

Almost surely, 2^266168197 is an apocalyptic number.

It is an amenable number.

266168197 is a deficient number, since it is larger than the sum of its proper divisors (1).

266168197 is an equidigital number, since it uses as much as digits as its factorization.

266168197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 266168197 is about 16314.6620253072. The cubic root of 266168197 is about 643.2582836080.

The spelling of 266168197 in words is "two hundred sixty-six million, one hundred sixty-eight thousand, one hundred ninety-seven".