266268689 has 4 divisors (see below), whose sum is σ = 266410224. Its totient is φ = 266127156.

The previous prime is 266268683. The next prime is 266268697. The reversal of 266268689 is 986862662.

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, and also an emirpimes, since its reverse is a distinct semiprime: 986862662 = 2 ⋅493431331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266268689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266268689.

It is not an unprimeable number, because it can be changed into a prime (266268683) 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, 67907 + ... + 71720.

It is an arithmetic number, because the mean of its divisors is an integer number (66602556).

Almost surely, 2^266268689 is an apocalyptic number.

It is an amenable number.

266268689 is a deficient number, since it is larger than the sum of its proper divisors (141535).

266268689 is a wasteful number, since it uses less digits than its factorization.

266268689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141534.

The product of its digits is 2985984, while the sum is 53.

The square root of 266268689 is about 16317.7415410344. The cubic root of 266268689 is about 643.3392276359.

The spelling of 266268689 in words is "two hundred sixty-six million, two hundred sixty-eight thousand, six hundred eighty-nine".