66305413 has 2 divisors, whose sum is σ = 66305414. Its totient is φ = 66305412.

The previous prime is 66305401. The next prime is 66305419. The reversal of 66305413 is 31450366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58476609 + 7828804 = 7647^2 + 2798^2 .

It is a cyclic number.

It is not a de Polignac number, because 66305413 - 2⁵ = 66305381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66305419) 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, 33152706 + 33152707.

It is an arithmetic number, because the mean of its divisors is an integer number (33152707).

Almost surely, 2^66305413 is an apocalyptic number.

It is an amenable number.

66305413 is a deficient number, since it is larger than the sum of its proper divisors (1).

66305413 is an equidigital number, since it uses as much as digits as its factorization.

66305413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 66305413 is about 8142.8135800840. The cubic root of 66305413 is about 404.7464001955.

Adding to 66305413 its reverse (31450366), we get a palindrome (97755779).

The spelling of 66305413 in words is "sixty-six million, three hundred five thousand, four hundred thirteen".