67004221 has 8 divisors (see below), whose sum is σ = 70962624. Its totient is φ = 63132960.

The previous prime is 67004213. The next prime is 67004227. The reversal of 67004221 is 12240076.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67004221 - 2³ = 67004213 is a prime.

It is a Duffinian number.

67004221 is a modest number, since divided by 4221 gives 67 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 67004192 and 67004201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67004227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20200 + ... + 23281.

It is an arithmetic number, because the mean of its divisors is an integer number (8870328).

Almost surely, 2^67004221 is an apocalyptic number.

It is an amenable number.

67004221 is a deficient number, since it is larger than the sum of its proper divisors (3958403).

67004221 is a wasteful number, since it uses less digits than its factorization.

67004221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43571.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 67004221 is about 8185.6106064239. The cubic root of 67004221 is about 406.1633391165.

Adding to 67004221 its reverse (12240076), we get a palindrome (79244297).

The spelling of 67004221 in words is "sixty-seven million, four thousand, two hundred twenty-one".