56664143 has 2 divisors, whose sum is σ = 56664144. Its totient is φ = 56664142.

The previous prime is 56664121. The next prime is 56664163. The reversal of 56664143 is 34146665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56664143 - 2⁶ = 56664079 is a prime.

It is equal to p_3375557 and since 56664143 and 3375557 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56664103) 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, 28332071 + 28332072.

It is an arithmetic number, because the mean of its divisors is an integer number (28332072).

Almost surely, 2^56664143 is an apocalyptic number.

56664143 is a deficient number, since it is larger than the sum of its proper divisors (1).

56664143 is an equidigital number, since it uses as much as digits as its factorization.

56664143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 35.

The square root of 56664143 is about 7527.5589004670. The cubic root of 56664143 is about 384.0927487732.

The spelling of 56664143 in words is "fifty-six million, six hundred sixty-four thousand, one hundred forty-three".