2661323105 has 16 divisors (see below), whose sum is σ = 3734696064. Its totient is φ = 1782466560.

The previous prime is 2661323083. The next prime is 2661323107. The reversal of 2661323105 is 5013231662.

It is not a de Polignac number, because 2661323105 - 2²⁴ = 2644545889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2661323107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 882656 + ... + 885665.

It is an arithmetic number, because the mean of its divisors is an integer number (233418504).

Almost surely, 2^2661323105 is an apocalyptic number.

It is an amenable number.

2661323105 is a deficient number, since it is larger than the sum of its proper divisors (1073372959).

2661323105 is a wasteful number, since it uses less digits than its factorization.

2661323105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768376.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 2661323105 is about 51588.0131910505. The cubic root of 2661323105 is about 1385.7956746425.

Adding to 2661323105 its reverse (5013231662), we get a palindrome (7674554767).

The spelling of 2661323105 in words is "two billion, six hundred sixty-one million, three hundred twenty-three thousand, one hundred five".