66204041 has 4 divisors (see below), whose sum is σ = 66268800. Its totient is φ = 66139284.

The previous prime is 66204031. The next prime is 66204043. The reversal of 66204041 is 14040266.

It is a happy number.

66204041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66204041 - 2¹⁰ = 66203017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66203998 and 66204016.

It is not an unprimeable number, because it can be changed into a prime (66204043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30821 + ... + 32898.

It is an arithmetic number, because the mean of its divisors is an integer number (16567200).

Almost surely, 2^66204041 is an apocalyptic number.

It is an amenable number.

66204041 is a deficient number, since it is larger than the sum of its proper divisors (64759).

66204041 is a wasteful number, since it uses less digits than its factorization.

66204041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64758.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 66204041 is about 8136.5865693176. The cubic root of 66204041 is about 404.5400275041.

The spelling of 66204041 in words is "sixty-six million, two hundred four thousand, forty-one".