266215097 has 4 divisors (see below), whose sum is σ = 271879296. Its totient is φ = 260550900.

The previous prime is 266215057. The next prime is 266215127. The reversal of 266215097 is 790512662.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 790512662 = 2 ⋅395256331.

It is a cyclic number.

It is not a de Polignac number, because 266215097 - 2²⁰ = 265166521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266215097.

It is not an unprimeable number, because it can be changed into a prime (266215057) 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 3 ways as a sum of consecutive naturals, for example, 2832029 + ... + 2832122.

It is an arithmetic number, because the mean of its divisors is an integer number (67969824).

Almost surely, 2^266215097 is an apocalyptic number.

It is an amenable number.

266215097 is a deficient number, since it is larger than the sum of its proper divisors (5664199).

266215097 is an equidigital number, since it uses as much as digits as its factorization.

266215097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5664198.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 266215097 is about 16316.0993193839. The cubic root of 266215097 is about 643.2960630298.

The spelling of 266215097 in words is "two hundred sixty-six million, two hundred fifteen thousand, ninety-seven".