82667678667779 has 2 divisors, whose sum is σ = 82667678667780. Its totient is φ = 82667678667778.

The previous prime is 82667678667733. The next prime is 82667678667787. The reversal of 82667678667779 is 97776687676628.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82667678667779 is a prime.

It is not a weakly prime, because it can be changed into another prime (82667678667799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41333839333889 + 41333839333890.

It is an arithmetic number, because the mean of its divisors is an integer number (41333839333890).

Almost surely, 2^{82667678667779} is an apocalyptic number.

82667678667779 is a deficient number, since it is larger than the sum of its proper divisors (1).

82667678667779 is an equidigital number, since it uses as much as digits as its factorization.

82667678667779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150556299264, while the sum is 92.

The spelling of 82667678667779 in words is "eighty-two trillion, six hundred sixty-seven billion, six hundred seventy-eight million, six hundred sixty-seven thousand, seven hundred seventy-nine".