2661113611 has 4 divisors (see below), whose sum is σ = 2865814672. Its totient is φ = 2456412552.

The previous prime is 2661113591. The next prime is 2661113621. The reversal of 2661113611 is 1163111662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1163111662 = 2 ⋅581555831.

It is a cyclic number.

It is not a de Polignac number, because 2661113611 - 2⁵ = 2661113579 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 2661113611.

It is not an unprimeable number, because it can be changed into a prime (2661113621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102350511 + ... + 102350536.

It is an arithmetic number, because the mean of its divisors is an integer number (716453668).

Almost surely, 2^2661113611 is an apocalyptic number.

2661113611 is a deficient number, since it is larger than the sum of its proper divisors (204701061).

2661113611 is a wasteful number, since it uses less digits than its factorization.

2661113611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204701060.

The product of its digits is 1296, while the sum is 28.

The square root of 2661113611 is about 51585.9826987913. The cubic root of 2661113611 is about 1385.7593113393.

The spelling of 2661113611 in words is "two billion, six hundred sixty-one million, one hundred thirteen thousand, six hundred eleven".