66834539 has 2 divisors, whose sum is σ = 66834540. Its totient is φ = 66834538.

The previous prime is 66834503. The next prime is 66834541. The reversal of 66834539 is 93543866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66834539 - 2¹² = 66830443 is a prime.

Together with 66834541, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66834539.

It is not a weakly prime, because it can be changed into another prime (66834139) 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, 33417269 + 33417270.

It is an arithmetic number, because the mean of its divisors is an integer number (33417270).

Almost surely, 2^66834539 is an apocalyptic number.

66834539 is a deficient number, since it is larger than the sum of its proper divisors (1).

66834539 is an equidigital number, since it uses as much as digits as its factorization.

66834539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 44.

The square root of 66834539 is about 8175.2393848743. The cubic root of 66834539 is about 405.8201922454.

The spelling of 66834539 in words is "sixty-six million, eight hundred thirty-four thousand, five hundred thirty-nine".