66198317 has 8 divisors (see below), whose sum is σ = 66873600. Its totient is φ = 65526784.

The previous prime is 66198311. The next prime is 66198331. The reversal of 66198317 is 71389166.

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 66198317 - 2¹⁰ = 66197293 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 (66198311) 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, 45284 + ... + 46722.

It is an arithmetic number, because the mean of its divisors is an integer number (8359200).

Almost surely, 2^66198317 is an apocalyptic number.

It is an amenable number.

66198317 is a deficient number, since it is larger than the sum of its proper divisors (675283).

66198317 is a wasteful number, since it uses less digits than its factorization.

66198317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875.

The product of its digits is 54432, while the sum is 41.

The square root of 66198317 is about 8136.2348171621. The cubic root of 66198317 is about 404.5283683273.

The spelling of 66198317 in words is "sixty-six million, one hundred ninety-eight thousand, three hundred seventeen".