5661544671 has 6 divisors (see below), whose sum is σ = 8177786760. Its totient is φ = 3774363108.

The previous prime is 5661544661. The next prime is 5661544699. The reversal of 5661544671 is 1764451665.

5661544671 is a `hidden beast` number, since 566 + 15 + 4 + 4 + 6 + 71 = 666.

5661544671 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5661544671 - 2²⁹ = 5124673759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661544661) 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 5 ways as a sum of consecutive naturals, for example, 314530251 + ... + 314530268.

It is an arithmetic number, because the mean of its divisors is an integer number (1362964460).

Almost surely, 2^5661544671 is an apocalyptic number.

5661544671 is a deficient number, since it is larger than the sum of its proper divisors (2516242089).

5661544671 is a wasteful number, since it uses less digits than its factorization.

5661544671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629060525 (or 629060522 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 5661544671 is about 75243.2367126774. The cubic root of 5661544671 is about 1782.2897636327.

The spelling of 5661544671 in words is "five billion, six hundred sixty-one million, five hundred forty-four thousand, six hundred seventy-one".