5661146165 has 4 divisors (see below), whose sum is σ = 6793375404. Its totient is φ = 4528916928.

The previous prime is 5661146143. The next prime is 5661146171. The reversal of 5661146165 is 5616411665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5616411665 = 5 ⋅1123282333.

It can be written as a sum of positive squares in 2 ways, for example, as 627101764 + 5034044401 = 25042^2 + 70951^2 .

It is a cyclic number.

It is not a de Polignac number, because 5661146165 - 2¹⁰ = 5661145141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 566114612 + ... + 566114621.

It is an arithmetic number, because the mean of its divisors is an integer number (1698343851).

Almost surely, 2^5661146165 is an apocalyptic number.

It is an amenable number.

5661146165 is a deficient number, since it is larger than the sum of its proper divisors (1132229239).

5661146165 is a wasteful number, since it uses less digits than its factorization.

5661146165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132229238.

The product of its digits is 129600, while the sum is 41.

The square root of 5661146165 is about 75240.5885476715. The cubic root of 5661146165 is about 1782.2479452556.

The spelling of 5661146165 in words is "five billion, six hundred sixty-one million, one hundred forty-six thousand, one hundred sixty-five".