67644041 has 2 divisors, whose sum is σ = 67644042. Its totient is φ = 67644040.

The previous prime is 67644013. The next prime is 67644053. The reversal of 67644041 is 14044676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34339600 + 33304441 = 5860^2 + 5771^2 .

It is a cyclic number.

It is not a de Polignac number, because 67644041 - 2⁶ = 67643977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67643989 and 67644007.

It is not a weakly prime, because it can be changed into another prime (67644011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33822020 + 33822021.

It is an arithmetic number, because the mean of its divisors is an integer number (33822021).

Almost surely, 2^67644041 is an apocalyptic number.

It is an amenable number.

67644041 is a deficient number, since it is larger than the sum of its proper divisors (1).

67644041 is an equidigital number, since it uses as much as digits as its factorization.

67644041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 67644041 is about 8224.5997471002. The cubic root of 67644041 is about 407.4520570392.

The spelling of 67644041 in words is "sixty-seven million, six hundred forty-four thousand, forty-one".