68664499446559 has 2 divisors, whose sum is σ = 68664499446560. Its totient is φ = 68664499446558.

The previous prime is 68664499446553. The next prime is 68664499446737. The reversal of 68664499446559 is 95564499446686.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68664499446559 - 2⁵ = 68664499446527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68664499446553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34332249723279 + 34332249723280.

It is an arithmetic number, because the mean of its divisors is an integer number (34332249723280).

Almost surely, 2^{68664499446559} is an apocalyptic number.

68664499446559 is a deficient number, since it is larger than the sum of its proper divisors (1).

68664499446559 is an equidigital number, since it uses as much as digits as its factorization.

68664499446559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48372940800, while the sum is 85.

The spelling of 68664499446559 in words is "sixty-eight trillion, six hundred sixty-four billion, four hundred ninety-nine million, four hundred forty-six thousand, five hundred fifty-nine".