2666288849 has 4 divisors (see below), whose sum is σ = 3047187264. Its totient is φ = 2285390436.

The previous prime is 2666288843. The next prime is 2666288873. The reversal of 2666288849 is 9488826662.

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 de Polignac number, because none of the positive numbers 2^k-2666288849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666288843) 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, 190449197 + ... + 190449210.

It is an arithmetic number, because the mean of its divisors is an integer number (761796816).

Almost surely, 2^2666288849 is an apocalyptic number.

It is an amenable number.

2666288849 is a deficient number, since it is larger than the sum of its proper divisors (380898415).

2666288849 is an equidigital number, since it uses as much as digits as its factorization.

2666288849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380898414.

The product of its digits is 15925248, while the sum is 59.

The square root of 2666288849 is about 51636.1196160207. The cubic root of 2666288849 is about 1386.6570545734.

It can be divided in two parts, 26662 and 88849, that added together give a palindrome (115511).

The spelling of 2666288849 in words is "two billion, six hundred sixty-six million, two hundred eighty-eight thousand, eight hundred forty-nine".