66473537613 has 16 divisors (see below), whose sum is σ = 101314607616. Its totient is φ = 37976779440.

The previous prime is 66473537573. The next prime is 66473537701. The reversal of 66473537613 is 31673537466.

66473537613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66473537613 - 2⁸ = 66473537357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66473537413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235923 + ... + 434288.

It is an arithmetic number, because the mean of its divisors is an integer number (6332162976).

Almost surely, 2^66473537613 is an apocalyptic number.

It is an amenable number.

66473537613 is a deficient number, since it is larger than the sum of its proper divisors (34841070003).

66473537613 is a wasteful number, since it uses less digits than its factorization.

66473537613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674944.

The product of its digits is 5715360, while the sum is 51.

The spelling of 66473537613 in words is "sixty-six billion, four hundred seventy-three million, five hundred thirty-seven thousand, six hundred thirteen".