66056017 has 2 divisors, whose sum is σ = 66056018. Its totient is φ = 66056016.

The previous prime is 66055993. The next prime is 66056051. The reversal of 66056017 is 71065066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59660176 + 6395841 = 7724^2 + 2529^2 .

It is a cyclic number.

It is not a de Polignac number, because 66056017 - 2¹¹ = 66053969 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 66056017.

It is not a weakly prime, because it can be changed into another prime (66056077) 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, 33028008 + 33028009.

It is an arithmetic number, because the mean of its divisors is an integer number (33028009).

Almost surely, 2^66056017 is an apocalyptic number.

It is an amenable number.

66056017 is a deficient number, since it is larger than the sum of its proper divisors (1).

66056017 is an equidigital number, since it uses as much as digits as its factorization.

66056017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 66056017 is about 8127.4852814385. The cubic root of 66056017 is about 404.2383021263.

The spelling of 66056017 in words is "sixty-six million, fifty-six thousand, seventeen".