67223646 has 48 divisors (see below), whose sum is σ = 168964224. Its totient is φ = 18917712.

The previous prime is 67223633. The next prime is 67223669. The reversal of 67223646 is 64632276.

It is a happy number.

67223646 is a `hidden beast` number, since 6 + 7 + 2 + 2 + 3 + 646 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 67223646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4461 + ... + 12423.

It is an arithmetic number, because the mean of its divisors is an integer number (3520088).

Almost surely, 2^67223646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67223646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84482112).

67223646 is an abundant number, since it is smaller than the sum of its proper divisors (101740578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67223646 is a wasteful number, since it uses less digits than its factorization.

67223646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8045 (or 8042 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 67223646 is about 8199.0027442366. The cubic root of 67223646 is about 406.6062230629.

The spelling of 67223646 in words is "sixty-seven million, two hundred twenty-three thousand, six hundred forty-six".