66025039 has 2 divisors, whose sum is σ = 66025040. Its totient is φ = 66025038.

The previous prime is 66025031. The next prime is 66025061. The reversal of 66025039 is 93052066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66025039 - 2³ = 66025031 is a prime.

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 66025039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66025031) 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, 33012519 + 33012520.

It is an arithmetic number, because the mean of its divisors is an integer number (33012520).

Almost surely, 2^66025039 is an apocalyptic number.

66025039 is a deficient number, since it is larger than the sum of its proper divisors (1).

66025039 is an equidigital number, since it uses as much as digits as its factorization.

66025039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 66025039 is about 8125.5793024252. The cubic root of 66025039 is about 404.1751009588.

The spelling of 66025039 in words is "sixty-six million, twenty-five thousand, thirty-nine".