82665438768047 has 4 divisors (see below), whose sum is σ = 82666154459160. Its totient is φ = 82664723076936.

The previous prime is 82665438768007. The next prime is 82665438768049. The reversal of 82665438768047 is 74086783456628.

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 82665438768047 - 2¹² = 82665438763951 is a prime.

It is a super-3 number, since 3×82665438768047³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82665438768049) 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, 357672272 + ... + 357903317.

It is an arithmetic number, because the mean of its divisors is an integer number (20666538614790).

Almost surely, 2^{82665438768047} is an apocalyptic number.

82665438768047 is a deficient number, since it is larger than the sum of its proper divisors (715691113).

82665438768047 is a wasteful number, since it uses less digits than its factorization.

82665438768047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715691112.

The product of its (nonzero) digits is 2601123840, while the sum is 74.

The spelling of 82665438768047 in words is "eighty-two trillion, six hundred sixty-five billion, four hundred thirty-eight million, seven hundred sixty-eight thousand, forty-seven".