266212073 has 4 divisors (see below), whose sum is σ = 266466900. Its totient is φ = 265957248.

The previous prime is 266212039. The next prime is 266212081. The reversal of 266212073 is 370212662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 370212662 = 2 ⋅185106331.

It can be written as a sum of positive squares in 2 ways, for example, as 211644304 + 54567769 = 14548^2 + 7387^2 .

It is a cyclic number.

It is not a de Polignac number, because 266212073 - 2⁸ = 266211817 is a prime.

It is a super-3 number, since 3×266212073³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (266212013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125840 + ... + 127937.

It is an arithmetic number, because the mean of its divisors is an integer number (66616725).

Almost surely, 2^266212073 is an apocalyptic number.

It is an amenable number.

266212073 is a deficient number, since it is larger than the sum of its proper divisors (254827).

266212073 is a wasteful number, since it uses less digits than its factorization.

266212073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254826.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 266212073 is about 16316.0066499128. The cubic root of 266212073 is about 643.2936272367.

The spelling of 266212073 in words is "two hundred sixty-six million, two hundred twelve thousand, seventy-three".