66558373 has 8 divisors (see below), whose sum is σ = 76127040. Its totient is φ = 57004800.

The previous prime is 66558361. The next prime is 66558379. The reversal of 66558373 is 37385566.

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 66558373 - 2¹⁷ = 66427301 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 (66558379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8238 + ... + 14176.

It is an arithmetic number, because the mean of its divisors is an integer number (9515880).

Almost surely, 2^66558373 is an apocalyptic number.

It is an amenable number.

66558373 is a deficient number, since it is larger than the sum of its proper divisors (9568667).

66558373 is a wasteful number, since it uses less digits than its factorization.

66558373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7547.

The product of its digits is 453600, while the sum is 43.

The square root of 66558373 is about 8158.3315083416. The cubic root of 66558373 is about 405.2604593971.

The spelling of 66558373 in words is "sixty-six million, five hundred fifty-eight thousand, three hundred seventy-three".