66334439 has 2 divisors, whose sum is σ = 66334440. Its totient is φ = 66334438.

The previous prime is 66334421. The next prime is 66334447. The reversal of 66334439 is 93443366.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66334439 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 (66334409) 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, 33167219 + 33167220.

It is an arithmetic number, because the mean of its divisors is an integer number (33167220).

Almost surely, 2^66334439 is an apocalyptic number.

66334439 is a deficient number, since it is larger than the sum of its proper divisors (1).

66334439 is an equidigital number, since it uses as much as digits as its factorization.

66334439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 38.

The square root of 66334439 is about 8144.5956928506. The cubic root of 66334439 is about 404.8054524638.

The spelling of 66334439 in words is "sixty-six million, three hundred thirty-four thousand, four hundred thirty-nine".