266320115 has 4 divisors (see below), whose sum is σ = 319584144. Its totient is φ = 213056088.

The previous prime is 266320099. The next prime is 266320127. The reversal of 266320115 is 511023662.

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

It is a cyclic number.

It is not a de Polignac number, because 266320115 - 2⁴ = 266320099 is a prime.

It is a super-2 number, since 2×266320115² = 141852807307226450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26632007 + ... + 26632016.

It is an arithmetic number, because the mean of its divisors is an integer number (79896036).

Almost surely, 2^266320115 is an apocalyptic number.

266320115 is a deficient number, since it is larger than the sum of its proper divisors (53264029).

266320115 is an equidigital number, since it uses as much as digits as its factorization.

266320115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53264028.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 266320115 is about 16319.3172344924. The cubic root of 266320115 is about 643.3806422355.

Adding to 266320115 its reverse (511023662), we get a palindrome (777343777).

The spelling of 266320115 in words is "two hundred sixty-six million, three hundred twenty thousand, one hundred fifteen".