66544506017 has 8 divisors (see below), whose sum is σ = 72675859392. Its totient is φ = 60426794800.

The previous prime is 66544506011. The next prime is 66544506073. The reversal of 66544506017 is 71060544566.

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 66544506017 - 2⁶ = 66544505953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66544506011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3400334 + ... + 3419847.

It is an arithmetic number, because the mean of its divisors is an integer number (9084482424).

Almost surely, 2^66544506017 is an apocalyptic number.

It is an amenable number.

66544506017 is a deficient number, since it is larger than the sum of its proper divisors (6131353375).

66544506017 is a wasteful number, since it uses less digits than its factorization.

66544506017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821079.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 66544506017 in words is "sixty-six billion, five hundred forty-four million, five hundred six thousand, seventeen".