68660219 has 2 divisors, whose sum is σ = 68660220. Its totient is φ = 68660218.

The previous prime is 68660209. The next prime is 68660227. The reversal of 68660219 is 91206686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68660219 - 2¹² = 68656123 is a prime.

It is a super-2 number, since 2×68660219² = 9428451346255922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68660209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34330109 + 34330110.

It is an arithmetic number, because the mean of its divisors is an integer number (34330110).

Almost surely, 2^68660219 is an apocalyptic number.

68660219 is a deficient number, since it is larger than the sum of its proper divisors (1).

68660219 is an equidigital number, since it uses as much as digits as its factorization.

68660219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 68660219 is about 8286.1462091855. The cubic root of 68660219 is about 409.4822315989.

The spelling of 68660219 in words is "sixty-eight million, six hundred sixty thousand, two hundred nineteen".