82660193839 has 4 divisors (see below), whose sum is σ = 82727453160. Its totient is φ = 82592934520.

The previous prime is 82660193807. The next prime is 82660193843. The reversal of 82660193839 is 93839106628.

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 82660193839 - 2⁵ = 82660193807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82660193839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82660197839) 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, 33627817 + ... + 33630274.

It is an arithmetic number, because the mean of its divisors is an integer number (20681863290).

Almost surely, 2^82660193839 is an apocalyptic number.

82660193839 is a deficient number, since it is larger than the sum of its proper divisors (67259321).

82660193839 is a wasteful number, since it uses less digits than its factorization.

82660193839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67259320.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The spelling of 82660193839 in words is "eighty-two billion, six hundred sixty million, one hundred ninety-three thousand, eight hundred thirty-nine".