66413593 has 2 divisors, whose sum is σ = 66413594. Its totient is φ = 66413592.

The previous prime is 66413551. The next prime is 66413597. The reversal of 66413593 is 39531466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50509449 + 15904144 = 7107^2 + 3988^2 .

It is a cyclic number.

It is not a de Polignac number, because 66413593 - 2¹⁷ = 66282521 is a prime.

It is not a weakly prime, because it can be changed into another prime (66413597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33206796 + 33206797.

It is an arithmetic number, because the mean of its divisors is an integer number (33206797).

Almost surely, 2^66413593 is an apocalyptic number.

It is an amenable number.

66413593 is a deficient number, since it is larger than the sum of its proper divisors (1).

66413593 is an equidigital number, since it uses as much as digits as its factorization.

66413593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 37.

The square root of 66413593 is about 8149.4535399621. The cubic root of 66413593 is about 404.9664007080.

The spelling of 66413593 in words is "sixty-six million, four hundred thirteen thousand, five hundred ninety-three".