6500006661673 has 6 divisors (see below), whose sum is σ = 7561232239146. Its totient is φ = 5571434281392.

The previous prime is 6500006661661. The next prime is 6500006661691. The reversal of 6500006661673 is 3761666000056.

6500006661673 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5194625005584 + 1305381656089 = 2279172^2 + 1142533^2 .

It is not a de Polignac number, because 6500006661673 - 2¹⁷ = 6500006530601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6500006661613) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66326598540 + ... + 66326598637.

It is an arithmetic number, because the mean of its divisors is an integer number (1260205373191).

Almost surely, 2^{6500006661673} is an apocalyptic number.

It is an amenable number.

6500006661673 is a deficient number, since it is larger than the sum of its proper divisors (1061225577473).

6500006661673 is a wasteful number, since it uses less digits than its factorization.

6500006661673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132653197191 (or 132653197184 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 46.

The spelling of 6500006661673 in words is "six trillion, five hundred billion, six million, six hundred sixty-one thousand, six hundred seventy-three".