66238117 has 8 divisors (see below), whose sum is σ = 74751840. Its totient is φ = 58139760.

The previous prime is 66238093. The next prime is 66238153. The reversal of 66238117 is 71183266.

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 66238117 - 2¹¹ = 66236069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66238157) 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, 103503 + ... + 104140.

It is an arithmetic number, because the mean of its divisors is an integer number (9343980).

Almost surely, 2^66238117 is an apocalyptic number.

It is an amenable number.

66238117 is a deficient number, since it is larger than the sum of its proper divisors (8513723).

66238117 is a wasteful number, since it uses less digits than its factorization.

66238117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207683.

The product of its digits is 12096, while the sum is 34.

The square root of 66238117 is about 8138.6802984268. The cubic root of 66238117 is about 404.6094227722.

The spelling of 66238117 in words is "sixty-six million, two hundred thirty-eight thousand, one hundred seventeen".