67220933 has 6 divisors (see below), whose sum is σ = 72789714. Its totient is φ = 62049936.

The previous prime is 67220929. The next prime is 67220957. The reversal of 67220933 is 33902276.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6723649 + 60497284 = 2593^2 + 7778^2 .

It is not a de Polignac number, because 67220933 - 2² = 67220929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67220933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67220333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 198710 + ... + 199047.

It is an arithmetic number, because the mean of its divisors is an integer number (12131619).

Almost surely, 2^67220933 is an apocalyptic number.

It is an amenable number.

67220933 is a deficient number, since it is larger than the sum of its proper divisors (5568781).

67220933 is a wasteful number, since it uses less digits than its factorization.

67220933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397783 (or 397770 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 67220933 is about 8198.8372956170. The cubic root of 67220933 is about 406.6007530754.

The spelling of 67220933 in words is "sixty-seven million, two hundred twenty thousand, nine hundred thirty-three".