66385193 has 8 divisors (see below), whose sum is σ = 76294080. Its totient is φ = 56582640.

The previous prime is 66385181. The next prime is 66385211. The reversal of 66385193 is 39158366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66385193 - 2⁶ = 66385129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66385193.

It is not an unprimeable number, because it can be changed into a prime (66385133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25238 + ... + 27743.

It is an arithmetic number, because the mean of its divisors is an integer number (9536760).

Almost surely, 2^66385193 is an apocalyptic number.

It is an amenable number.

66385193 is a deficient number, since it is larger than the sum of its proper divisors (9908887).

66385193 is a wasteful number, since it uses less digits than its factorization.

66385193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53167.

The product of its digits is 116640, while the sum is 41.

The square root of 66385193 is about 8147.7109055243. The cubic root of 66385193 is about 404.9086681214.

The spelling of 66385193 in words is "sixty-six million, three hundred eighty-five thousand, one hundred ninety-three".