266372081 has 4 divisors (see below), whose sum is σ = 266460132. Its totient is φ = 266284032.

The previous prime is 266372063. The next prime is 266372083. The reversal of 266372081 is 180273662.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180273662 = 2 ⋅90136831.

It can be written as a sum of positive squares in 2 ways, for example, as 188650225 + 77721856 = 13735^2 + 8816^2 .

It is a cyclic number.

It is not a de Polignac number, because 266372081 - 2¹⁴ = 266355697 is a prime.

It is a super-2 number, since 2×266372081² = 141908171072541122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266372083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39320 + ... + 45593.

It is an arithmetic number, because the mean of its divisors is an integer number (66615033).

Almost surely, 2^266372081 is an apocalyptic number.

It is an amenable number.

266372081 is a deficient number, since it is larger than the sum of its proper divisors (88051).

266372081 is an equidigital number, since it uses as much as digits as its factorization.

266372081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88050.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 266372081 is about 16320.9093190300. The cubic root of 266372081 is about 643.4224862949.

The spelling of 266372081 in words is "two hundred sixty-six million, three hundred seventy-two thousand, eighty-one".