66109373 has 8 divisors (see below), whose sum is σ = 72639840. Its totient is φ = 59665680.

The previous prime is 66109339. The next prime is 66109397. The reversal of 66109373 is 37390166.

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 66109373 - 2¹⁰ = 66108349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66109313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20090 + ... + 23147.

It is an arithmetic number, because the mean of its divisors is an integer number (9079980).

Almost surely, 2^66109373 is an apocalyptic number.

It is an amenable number.

66109373 is a deficient number, since it is larger than the sum of its proper divisors (6530467).

66109373 is a wasteful number, since it uses less digits than its factorization.

66109373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43387.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 66109373 is about 8130.7670609851. The cubic root of 66109373 is about 404.3471124723.

It can be divided in two parts, 661093 and 73, that added together give a palindrome (661166).

The spelling of 66109373 in words is "sixty-six million, one hundred nine thousand, three hundred seventy-three".