266065489 has 4 divisors (see below), whose sum is σ = 266374656. Its totient is φ = 265756324.

The previous prime is 266065477. The next prime is 266065507. The reversal of 266065489 is 984560662.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266065489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266065439) 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, 153289 + ... + 155014.

It is an arithmetic number, because the mean of its divisors is an integer number (66593664).

Almost surely, 2^266065489 is an apocalyptic number.

It is an amenable number.

266065489 is a deficient number, since it is larger than the sum of its proper divisors (309167).

266065489 is an equidigital number, since it uses as much as digits as its factorization.

266065489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309166.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 266065489 is about 16311.5140008523. The cubic root of 266065489 is about 643.1755335871.

The spelling of 266065489 in words is "two hundred sixty-six million, sixty-five thousand, four hundred eighty-nine".