67081633 has 2 divisors, whose sum is σ = 67081634. Its totient is φ = 67081632.

The previous prime is 67081631. The next prime is 67081661. The reversal of 67081633 is 33618076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55845729 + 11235904 = 7473^2 + 3352^2 .

It is a cyclic number.

It is not a de Polignac number, because 67081633 - 2¹ = 67081631 is a prime.

Together with 67081631, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (67081631) 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, 33540816 + 33540817.

It is an arithmetic number, because the mean of its divisors is an integer number (33540817).

Almost surely, 2^67081633 is an apocalyptic number.

It is an amenable number.

67081633 is a deficient number, since it is larger than the sum of its proper divisors (1).

67081633 is an equidigital number, since it uses as much as digits as its factorization.

67081633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 67081633 is about 8190.3377830221. The cubic root of 67081633 is about 406.3196965076.

The spelling of 67081633 in words is "sixty-seven million, eighty-one thousand, six hundred thirty-three".