67599853921 has 2 divisors, whose sum is σ = 67599853922. Its totient is φ = 67599853920.

The previous prime is 67599853837. The next prime is 67599853939. The reversal of 67599853921 is 12935899576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62740230400 + 4859623521 = 250480^2 + 69711^2 .

It is a cyclic number.

It is not a de Polignac number, because 67599853921 - 2²⁷ = 67465636193 is a prime.

It is not a weakly prime, because it can be changed into another prime (67599853991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33799926960 + 33799926961.

It is an arithmetic number, because the mean of its divisors is an integer number (33799926961).

Almost surely, 2^67599853921 is an apocalyptic number.

It is an amenable number.

67599853921 is a deficient number, since it is larger than the sum of its proper divisors (1).

67599853921 is an equidigital number, since it uses as much as digits as its factorization.

67599853921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36741600, while the sum is 64.

The spelling of 67599853921 in words is "sixty-seven billion, five hundred ninety-nine million, eight hundred fifty-three thousand, nine hundred twenty-one".