67644040307 has 2 divisors, whose sum is σ = 67644040308. Its totient is φ = 67644040306.

The previous prime is 67644040283. The next prime is 67644040361. The reversal of 67644040307 is 70304044676.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67644040307 - 2¹⁰ = 67644039283 is a prime.

It is not a weakly prime, because it can be changed into another prime (67644040907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33822020153 + 33822020154.

It is an arithmetic number, because the mean of its divisors is an integer number (33822020154).

Almost surely, 2^67644040307 is an apocalyptic number.

67644040307 is a deficient number, since it is larger than the sum of its proper divisors (1).

67644040307 is an equidigital number, since it uses as much as digits as its factorization.

67644040307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 41.

The spelling of 67644040307 in words is "sixty-seven billion, six hundred forty-four million, forty thousand, three hundred seven".