56077661 has 2 divisors, whose sum is σ = 56077662. Its totient is φ = 56077660.

The previous prime is 56077643. The next prime is 56077673. The reversal of 56077661 is 16677065.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55428025 + 649636 = 7445^2 + 806^2 .

It is a cyclic number.

It is not a de Polignac number, because 56077661 - 2¹⁰ = 56076637 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 (56077631) 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 as a sum of consecutive naturals, namely, 28038830 + 28038831.

It is an arithmetic number, because the mean of its divisors is an integer number (28038831).

Almost surely, 2^56077661 is an apocalyptic number.

It is an amenable number.

56077661 is a deficient number, since it is larger than the sum of its proper divisors (1).

56077661 is an equidigital number, since it uses as much as digits as its factorization.

56077661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 56077661 is about 7488.5019196098. The cubic root of 56077661 is about 382.7630121817.

The spelling of 56077661 in words is "fifty-six million, seventy-seven thousand, six hundred sixty-one".