56116661 has 2 divisors, whose sum is σ = 56116662. Its totient is φ = 56116660.

The previous prime is 56116649. The next prime is 56116673. The reversal of 56116661 is 16661165.

56116661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (56116649) and next prime (56116673).

It can be written as a sum of positive squares in only one way, i.e., 53377636 + 2739025 = 7306^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 56116661 - 2⁶ = 56116597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56116681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28058330 + 28058331.

It is an arithmetic number, because the mean of its divisors is an integer number (28058331).

Almost surely, 2^56116661 is an apocalyptic number.

It is an amenable number.

56116661 is a deficient number, since it is larger than the sum of its proper divisors (1).

56116661 is an equidigital number, since it uses as much as digits as its factorization.

56116661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 56116661 is about 7491.1054591429. The cubic root of 56116661 is about 382.8517242640.

The spelling of 56116661 in words is "fifty-six million, one hundred sixteen thousand, six hundred sixty-one".