5661656159 has 2 divisors, whose sum is σ = 5661656160. Its totient is φ = 5661656158.

The previous prime is 5661656141. The next prime is 5661656171. The reversal of 5661656159 is 9516561665.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5661656159 - 2²⁰ = 5660607583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5661686159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830828079 + 2830828080.

It is an arithmetic number, because the mean of its divisors is an integer number (2830828080).

Almost surely, 2^5661656159 is an apocalyptic number.

5661656159 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661656159 is an equidigital number, since it uses as much as digits as its factorization.

5661656159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458000, while the sum is 50.

The square root of 5661656159 is about 75243.9775596692. The cubic root of 5661656159 is about 1782.3014625964.

The spelling of 5661656159 in words is "five billion, six hundred sixty-one million, six hundred fifty-six thousand, one hundred fifty-nine".