82660248821 has 2 divisors, whose sum is σ = 82660248822. Its totient is φ = 82660248820.

The previous prime is 82660248817. The next prime is 82660248829. The reversal of 82660248821 is 12884206628.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79022832100 + 3637416721 = 281110^2 + 60311^2 .

It is a cyclic number.

It is not a de Polignac number, because 82660248821 - 2² = 82660248817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82660248829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41330124410 + 41330124411.

It is an arithmetic number, because the mean of its divisors is an integer number (41330124411).

Almost surely, 2^82660248821 is an apocalyptic number.

It is an amenable number.

82660248821 is a deficient number, since it is larger than the sum of its proper divisors (1).

82660248821 is an equidigital number, since it uses as much as digits as its factorization.

82660248821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 589824, while the sum is 47.

The spelling of 82660248821 in words is "eighty-two billion, six hundred sixty million, two hundred forty-eight thousand, eight hundred twenty-one".