2661361266115 has 16 divisors (see below), whose sum is σ = 3416829657120. Its totient is φ = 1983965598720.

The previous prime is 2661361266073. The next prime is 2661361266163. The reversal of 2661361266115 is 5116621631662.

It is a happy number.

It is not a de Polignac number, because 2661361266115 - 2⁹ = 2661361265603 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229619854 + ... + 229631443.

It is an arithmetic number, because the mean of its divisors is an integer number (213551853570).

Almost surely, 2^{2661361266115} is an apocalyptic number.

2661361266115 is a deficient number, since it is larger than the sum of its proper divisors (755468391005).

2661361266115 is a wasteful number, since it uses less digits than its factorization.

2661361266115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459251382.

The product of its digits is 466560, while the sum is 46.

Adding to 2661361266115 its reverse (5116621631662), we get a palindrome (7777982897777).

The spelling of 2661361266115 in words is "two trillion, six hundred sixty-one billion, three hundred sixty-one million, two hundred sixty-six thousand, one hundred fifteen".