266849397 has 10 divisors (see below), whose sum is σ = 398626998. Its totient is φ = 177899544.

The previous prime is 266849393. The next prime is 266849423. The reversal of 266849397 is 793948662.

It is a happy number.

266849397 is a `hidden beast` number, since 2 + 6 + 68 + 493 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 156725361 + 110124036 = 12519^2 + 10494^2 .

It is not a de Polignac number, because 266849397 - 2² = 266849393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266849393) 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 9 ways as a sum of consecutive naturals, for example, 1647138 + ... + 1647299.

Almost surely, 2^266849397 is an apocalyptic number.

266849397 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

266849397 is a deficient number, since it is larger than the sum of its proper divisors (131777601).

266849397 is an equidigital number, since it uses as much as digits as its factorization.

266849397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294449 (or 3294440 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 266849397 is about 16335.5256113784. The cubic root of 266849397 is about 643.8065763328.

The spelling of 266849397 in words is "two hundred sixty-six million, eight hundred forty-nine thousand, three hundred ninety-seven".