67000018 has 4 divisors (see below), whose sum is σ = 100500030. Its totient is φ = 33500008.

The previous prime is 66999997. The next prime is 67000019. The reversal of 67000018 is 81000076.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 52461049 + 14538969 = 7243^2 + 3813^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (67000019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16750003 + ... + 16750006.

Almost surely, 2^67000018 is an apocalyptic number.

67000018 is a deficient number, since it is larger than the sum of its proper divisors (33500012).

67000018 is a wasteful number, since it uses less digits than its factorization.

67000018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33500011.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 67000018 is about 8185.3538713974. The cubic root of 67000018 is about 406.1548464166.

The spelling of 67000018 in words is "sixty-seven million, eighteen", and thus it is an aban number and an uban number.