66410593 has 2 divisors, whose sum is σ = 66410594. Its totient is φ = 66410592.

The previous prime is 66410563. The next prime is 66410627. The reversal of 66410593 is 39501466.

It is an a-pointer prime, because the next prime (66410627) can be obtained adding 66410593 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65820769 + 589824 = 8113^2 + 768^2 .

It is a cyclic number.

It is not a de Polignac number, because 66410593 - 2²¹ = 64313441 is a prime.

It is a super-2 number, since 2×66410593² = 8820733725223298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66410543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33205296 + 33205297.

It is an arithmetic number, because the mean of its divisors is an integer number (33205297).

Almost surely, 2^66410593 is an apocalyptic number.

It is an amenable number.

66410593 is a deficient number, since it is larger than the sum of its proper divisors (1).

66410593 is an equidigital number, since it uses as much as digits as its factorization.

66410593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 66410593 is about 8149.2694764623. The cubic root of 66410593 is about 404.9603029729.

The spelling of 66410593 in words is "sixty-six million, four hundred ten thousand, five hundred ninety-three".