5661111271 has 2 divisors, whose sum is σ = 5661111272. Its totient is φ = 5661111270.

The previous prime is 5661111229. The next prime is 5661111289. The reversal of 5661111271 is 1721111665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5661111271 - 2⁹ = 5661110759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5661111871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830555635 + 2830555636.

It is an arithmetic number, because the mean of its divisors is an integer number (2830555636).

Almost surely, 2^5661111271 is an apocalyptic number.

5661111271 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661111271 is an equidigital number, since it uses as much as digits as its factorization.

5661111271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 31.

The square root of 5661111271 is about 75240.3566644922. The cubic root of 5661111271 is about 1782.2442834596.

The spelling of 5661111271 in words is "five billion, six hundred sixty-one million, one hundred eleven thousand, two hundred seventy-one".