66382073 has 4 divisors (see below), whose sum is σ = 68671140. Its totient is φ = 64093008.

The previous prime is 66382061. The next prime is 66382081. The reversal of 66382073 is 37028366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35557369 + 30824704 = 5963^2 + 5552^2 .

It is a cyclic number.

It is not a de Polignac number, because 66382073 - 2⁶ = 66382009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66382013) 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 3 ways as a sum of consecutive naturals, for example, 1144490 + ... + 1144547.

It is an arithmetic number, because the mean of its divisors is an integer number (17167785).

Almost surely, 2^66382073 is an apocalyptic number.

It is an amenable number.

66382073 is a deficient number, since it is larger than the sum of its proper divisors (2289067).

66382073 is a wasteful number, since it uses less digits than its factorization.

66382073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289066.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 66382073 is about 8147.5194384549. The cubic root of 66382073 is about 404.9023246645.

The spelling of 66382073 in words is "sixty-six million, three hundred eighty-two thousand, seventy-three".