82667779 has 2 divisors, whose sum is σ = 82667780. Its totient is φ = 82667778.

The previous prime is 82667699. The next prime is 82667807. The reversal of 82667779 is 97776628.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82667779 - 2¹³ = 82659587 is a prime.

It is not a weakly prime, because it can be changed into another prime (82667279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41333889 + 41333890.

It is an arithmetic number, because the mean of its divisors is an integer number (41333890).

Almost surely, 2^82667779 is an apocalyptic number.

82667779 is a deficient number, since it is larger than the sum of its proper divisors (1).

82667779 is an equidigital number, since it uses as much as digits as its factorization.

82667779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 52.

The square root of 82667779 is about 9092.1823012960. The cubic root of 82667779 is about 435.6242923236.

The spelling of 82667779 in words is "eighty-two million, six hundred sixty-seven thousand, seven hundred seventy-nine".