266262065 has 4 divisors (see below), whose sum is σ = 319514484. Its totient is φ = 213009648.

The previous prime is 266262047. The next prime is 266262071. The reversal of 266262065 is 560262662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560262662 = 2 ⋅280131331.

It can be written as a sum of positive squares in 2 ways, for example, as 137757169 + 128504896 = 11737^2 + 11336^2 .

It is a cyclic number.

It is not a de Polignac number, because 266262065 - 2⁶ = 266262001 is a prime.

It is a Duffinian number.

It is a Curzon 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, 26626202 + ... + 26626211.

It is an arithmetic number, because the mean of its divisors is an integer number (79878621).

Almost surely, 2^266262065 is an apocalyptic number.

It is an amenable number.

266262065 is a deficient number, since it is larger than the sum of its proper divisors (53252419).

266262065 is an equidigital number, since it uses as much as digits as its factorization.

266262065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53252418.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 266262065 is about 16317.5385705075. The cubic root of 266262065 is about 643.3338927811. Note that the first 3 decimals are identical.

The spelling of 266262065 in words is "two hundred sixty-six million, two hundred sixty-two thousand, sixty-five".