66055165617 has 8 divisors (see below), whose sum is σ = 100655490496. Its totient is φ = 37745808912.

The previous prime is 66055165607. The next prime is 66055165619. The reversal of 66055165617 is 71656155066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66055165617 - 2¹⁵ = 66055132849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66055165619) 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, 1572742018 + ... + 1572742059.

It is an arithmetic number, because the mean of its divisors is an integer number (12581936312).

Almost surely, 2^66055165617 is an apocalyptic number.

It is an amenable number.

66055165617 is a deficient number, since it is larger than the sum of its proper divisors (34600324879).

66055165617 is a wasteful number, since it uses less digits than its factorization.

66055165617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145484087.

The product of its (nonzero) digits is 1134000, while the sum is 48.

The spelling of 66055165617 in words is "sixty-six billion, fifty-five million, one hundred sixty-five thousand, six hundred seventeen".