66539374592147 has 4 divisors (see below), whose sum is σ = 67955105966496. Its totient is φ = 65123643217800.

The previous prime is 66539374592143. The next prime is 66539374592153. The reversal of 66539374592147 is 74129547393566.

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

It is a cyclic number.

It is not a de Polignac number, because 66539374592147 - 2² = 66539374592143 is a prime.

It is a super-2 number, since 2×66539374592147² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66539374592143) 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, 707865687104 + ... + 707865687197.

It is an arithmetic number, because the mean of its divisors is an integer number (16988776491624).

Almost surely, 2^{66539374592147} is an apocalyptic number.

66539374592147 is a deficient number, since it is larger than the sum of its proper divisors (1415731374349).

66539374592147 is a wasteful number, since it uses less digits than its factorization.

66539374592147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415731374348.

The product of its digits is 1028764800, while the sum is 71.

The spelling of 66539374592147 in words is "sixty-six trillion, five hundred thirty-nine billion, three hundred seventy-four million, five hundred ninety-two thousand, one hundred forty-seven".