21010066579 has 2 divisors, whose sum is σ = 21010066580. Its totient is φ = 21010066578.

The previous prime is 21010066559. The next prime is 21010066613. The reversal of 21010066579 is 97566001012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21010066579 - 2²¹ = 21007969427 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010066549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505033289 + 10505033290.

It is an arithmetic number, because the mean of its divisors is an integer number (10505033290).

Almost surely, 2^21010066579 is an apocalyptic number.

21010066579 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010066579 is an equidigital number, since it uses as much as digits as its factorization.

21010066579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 37.

The spelling of 21010066579 in words is "twenty-one billion, ten million, sixty-six thousand, five hundred seventy-nine".