82665400275439 has 16 divisors (see below), whose sum is σ = 83761855211520. Its totient is φ = 81570206390400.

The previous prime is 82665400275421. The next prime is 82665400275443. The reversal of 82665400275439 is 93457200456628.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 82665400275439 - 2¹⁵ = 82665400242671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82665407275439) 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, 1673601127 + ... + 1673650519.

It is an arithmetic number, because the mean of its divisors is an integer number (5235115950720).

Almost surely, 2^{82665400275439} is an apocalyptic number.

82665400275439 is a deficient number, since it is larger than the sum of its proper divisors (1096454936081).

82665400275439 is a wasteful number, since it uses less digits than its factorization.

82665400275439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61710.

The product of its (nonzero) digits is 87091200, while the sum is 61.

The spelling of 82665400275439 in words is "eighty-two trillion, six hundred sixty-five billion, four hundred million, two hundred seventy-five thousand, four hundred thirty-nine".