67426221 has 4 divisors (see below), whose sum is σ = 89901632. Its totient is φ = 44950812.

The previous prime is 67426213. The next prime is 67426223. The reversal of 67426221 is 12262476.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 67426221 - 2³ = 67426213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67426223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11237701 + ... + 11237706.

It is an arithmetic number, because the mean of its divisors is an integer number (22475408).

Almost surely, 2^67426221 is an apocalyptic number.

It is an amenable number.

67426221 is a deficient number, since it is larger than the sum of its proper divisors (22475411).

67426221 is a wasteful number, since it uses less digits than its factorization.

67426221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22475410.

The product of its digits is 8064, while the sum is 30.

The square root of 67426221 is about 8211.3470880240. The cubic root of 67426221 is about 407.0142424692.

Adding to 67426221 its reverse (12262476), we get a palindrome (79688697).

The spelling of 67426221 in words is "sixty-seven million, four hundred twenty-six thousand, two hundred twenty-one".