56661043 has 2 divisors, whose sum is σ = 56661044. Its totient is φ = 56661042.

The previous prime is 56661019. The next prime is 56661061. The reversal of 56661043 is 34016665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56661043 - 2¹⁷ = 56529971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56660996 and 56661014.

It is not a weakly prime, because it can be changed into another prime (56661013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28330521 + 28330522.

It is an arithmetic number, because the mean of its divisors is an integer number (28330522).

Almost surely, 2^56661043 is an apocalyptic number.

56661043 is a deficient number, since it is larger than the sum of its proper divisors (1).

56661043 is an equidigital number, since it uses as much as digits as its factorization.

56661043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 56661043 is about 7527.3529876046. The cubic root of 56661043 is about 384.0857442893.

The spelling of 56661043 in words is "fifty-six million, six hundred sixty-one thousand, forty-three".