66432439 has 2 divisors, whose sum is σ = 66432440. Its totient is φ = 66432438.

The previous prime is 66432437. The next prime is 66432451. The reversal of 66432439 is 93423466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66432439 - 2¹ = 66432437 is a prime.

Together with 66432437, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 66432398 and 66432407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66432437) 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, 33216219 + 33216220.

It is an arithmetic number, because the mean of its divisors is an integer number (33216220).

Almost surely, 2^66432439 is an apocalyptic number.

66432439 is a deficient number, since it is larger than the sum of its proper divisors (1).

66432439 is an equidigital number, since it uses as much as digits as its factorization.

66432439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 37.

The square root of 66432439 is about 8150.6097317931. The cubic root of 66432439 is about 405.0047024806.

The spelling of 66432439 in words is "sixty-six million, four hundred thirty-two thousand, four hundred thirty-nine".