66436043 has 2 divisors, whose sum is σ = 66436044. Its totient is φ = 66436042.

The previous prime is 66436039. The next prime is 66436057. The reversal of 66436043 is 34063466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66436043 - 2² = 66436039 is a prime.

It is not a weakly prime, because it can be changed into another prime (66436033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33218021 + 33218022.

It is an arithmetic number, because the mean of its divisors is an integer number (33218022).

Almost surely, 2^66436043 is an apocalyptic number.

66436043 is a deficient number, since it is larger than the sum of its proper divisors (1).

66436043 is an equidigital number, since it uses as much as digits as its factorization.

66436043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 66436043 is about 8150.8308165487. The cubic root of 66436043 is about 405.0120262648.

The spelling of 66436043 in words is "sixty-six million, four hundred thirty-six thousand, forty-three".