67322421 has 36 divisors (see below), whose sum is σ = 104550784. Its totient is φ = 43302600.

The previous prime is 67322401. The next prime is 67322429. The reversal of 67322421 is 12422376.

It is not a de Polignac number, because 67322421 - 2⁵ = 67322389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67322429) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 203226 + ... + 203556.

Almost surely, 2^67322421 is an apocalyptic number.

It is an amenable number.

67322421 is a deficient number, since it is larger than the sum of its proper divisors (37228363).

67322421 is an frugal number, since it uses more digits than its factorization.

67322421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 365 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 67322421 is about 8205.0241315916. The cubic root of 67322421 is about 406.8052744245.

Adding to 67322421 its reverse (12422376), we get a palindrome (79744797).

The spelling of 67322421 in words is "sixty-seven million, three hundred twenty-two thousand, four hundred twenty-one".