2655105661 has 4 divisors (see below), whose sum is σ = 2859344572. Its totient is φ = 2450866752.

The previous prime is 2655105659. The next prime is 2655105667. The reversal of 2655105661 is 1665015562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1054625625 + 1600480036 = 32475^2 + 40006^2 .

It is a cyclic number.

It is not a de Polignac number, because 2655105661 - 2¹ = 2655105659 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 2655105661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2655105667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102119436 + ... + 102119461.

It is an arithmetic number, because the mean of its divisors is an integer number (714836143).

Almost surely, 2^2655105661 is an apocalyptic number.

It is an amenable number.

2655105661 is a deficient number, since it is larger than the sum of its proper divisors (204238911).

2655105661 is a wasteful number, since it uses less digits than its factorization.

2655105661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204238910.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 2655105661 is about 51527.7174052956. The cubic root of 2655105661 is about 1384.7156572853.

Subtracting from 2655105661 its reverse (1665015562), we obtain a palindrome (990090099).

The spelling of 2655105661 in words is "two billion, six hundred fifty-five million, one hundred five thousand, six hundred sixty-one".