67218964 has 6 divisors (see below), whose sum is σ = 117633194. Its totient is φ = 33609480.

The previous prime is 67218953. The next prime is 67218971. The reversal of 67218964 is 46981276.

It can be written as a sum of positive squares in only one way, i.e., 56130064 + 11088900 = 7492^2 + 3330^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 67218964.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8402367 + ... + 8402374.

Almost surely, 2^67218964 is an apocalyptic number.

It is an amenable number.

67218964 is a deficient number, since it is larger than the sum of its proper divisors (50414230).

67218964 is a wasteful number, since it uses less digits than its factorization.

67218964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16804745 (or 16804743 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 67218964 is about 8198.7172167358. The cubic root of 67218964 is about 406.5967830586.

The spelling of 67218964 in words is "sixty-seven million, two hundred eighteen thousand, nine hundred sixty-four".