66584792137 has 4 divisors (see below), whose sum is σ = 66607221780. Its totient is φ = 66562362496.

The previous prime is 66584792129. The next prime is 66584792159. The reversal of 66584792137 is 73129748566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29233818441 + 37350973696 = 170979^2 + 193264^2 .

It is a cyclic number.

It is not a de Polignac number, because 66584792137 - 2³ = 66584792129 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66584792167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11210368 + ... + 11216305.

It is an arithmetic number, because the mean of its divisors is an integer number (16651805445).

Almost surely, 2^66584792137 is an apocalyptic number.

It is an amenable number.

66584792137 is a deficient number, since it is larger than the sum of its proper divisors (22429643).

66584792137 is a wasteful number, since it uses less digits than its factorization.

66584792137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22429642.

The product of its digits is 15240960, while the sum is 58.

The spelling of 66584792137 in words is "sixty-six billion, five hundred eighty-four million, seven hundred ninety-two thousand, one hundred thirty-seven".