66044359 has 4 divisors (see below), whose sum is σ = 66661704. Its totient is φ = 65427016.

The previous prime is 66044357. The next prime is 66044369. The reversal of 66044359 is 95344066.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66044359 - 2¹ = 66044357 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 (66044351) 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, 308512 + ... + 308725.

It is an arithmetic number, because the mean of its divisors is an integer number (16665426).

Almost surely, 2^66044359 is an apocalyptic number.

66044359 is a deficient number, since it is larger than the sum of its proper divisors (617345).

66044359 is a wasteful number, since it uses less digits than its factorization.

66044359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617344.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 66044359 is about 8126.7680537837. The cubic root of 66044359 is about 404.2145198497.

The spelling of 66044359 in words is "sixty-six million, forty-four thousand, three hundred fifty-nine".