67406216 has 8 divisors (see below), whose sum is σ = 126386670. Its totient is φ = 33703104.

The previous prime is 67406203. The next prime is 67406219. The reversal of 67406216 is 61260476.

It can be written as a sum of positive squares in only one way, i.e., 67404100 + 2116 = 8210^2 + 46^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (67406219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4212881 + ... + 4212896.

Almost surely, 2^67406216 is an apocalyptic number.

It is an amenable number.

67406216 is a deficient number, since it is larger than the sum of its proper divisors (58980454).

67406216 is a wasteful number, since it uses less digits than its factorization.

67406216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8425783 (or 8425779 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 67406216 is about 8210.1288662237. The cubic root of 67406216 is about 406.9739855029.

The spelling of 67406216 in words is "sixty-seven million, four hundred six thousand, two hundred sixteen".