266489641 has 4 divisors (see below), whose sum is σ = 290715984. Its totient is φ = 242263300.

The previous prime is 266489623. The next prime is 266489669. The reversal of 266489641 is 146984662.

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 not a de Polignac number, because 266489641 - 2⁷ = 266489513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266489591 and 266489600.

It is not an unprimeable number, because it can be changed into a prime (266484641) 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, 12113155 + ... + 12113176.

It is an arithmetic number, because the mean of its divisors is an integer number (72678996).

Almost surely, 2^266489641 is an apocalyptic number.

It is an amenable number.

266489641 is a deficient number, since it is larger than the sum of its proper divisors (24226343).

266489641 is a wasteful number, since it uses less digits than its factorization.

266489641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24226342.

The product of its digits is 497664, while the sum is 46.

The square root of 266489641 is about 16324.5104367635. The cubic root of 266489641 is about 643.5171278732.

The spelling of 266489641 in words is "two hundred sixty-six million, four hundred eighty-nine thousand, six hundred forty-one".