82681663 has 2 divisors, whose sum is σ = 82681664. Its totient is φ = 82681662.

The previous prime is 82681633. The next prime is 82681679. The reversal of 82681663 is 36618628.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82681663 - 2¹⁷ = 82550591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82681633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41340831 + 41340832.

It is an arithmetic number, because the mean of its divisors is an integer number (41340832).

Almost surely, 2^82681663 is an apocalyptic number.

82681663 is a deficient number, since it is larger than the sum of its proper divisors (1).

82681663 is an equidigital number, since it uses as much as digits as its factorization.

82681663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 40.

The square root of 82681663 is about 9092.9457823084. The cubic root of 82681663 is about 435.6486785645.

The spelling of 82681663 in words is "eighty-two million, six hundred eighty-one thousand, six hundred sixty-three".