82660559 has 2 divisors, whose sum is σ = 82660560. Its totient is φ = 82660558.

The previous prime is 82660541. The next prime is 82660573. The reversal of 82660559 is 95506628.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82660559 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82660519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41330279 + 41330280.

It is an arithmetic number, because the mean of its divisors is an integer number (41330280).

Almost surely, 2^82660559 is an apocalyptic number.

82660559 is a deficient number, since it is larger than the sum of its proper divisors (1).

82660559 is an equidigital number, since it uses as much as digits as its factorization.

82660559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 82660559 is about 9091.7852482337. The cubic root of 82660559 is about 435.6116098372.

The spelling of 82660559 in words is "eighty-two million, six hundred sixty thousand, five hundred fifty-nine".