67071967 has 4 divisors (see below), whose sum is σ = 68208840. Its totient is φ = 65935096.

The previous prime is 67071947. The next prime is 67071989. The reversal of 67071967 is 76917076.

It is a happy number.

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

It is not a de Polignac number, because 67071967 - 2⁷ = 67071839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67071947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 568348 + ... + 568465.

It is an arithmetic number, because the mean of its divisors is an integer number (17052210).

Almost surely, 2^67071967 is an apocalyptic number.

67071967 is a deficient number, since it is larger than the sum of its proper divisors (1136873).

67071967 is a wasteful number, since it uses less digits than its factorization.

67071967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136872.

The product of its (nonzero) digits is 111132, while the sum is 43.

The square root of 67071967 is about 8189.7476762108. The cubic root of 67071967 is about 406.3001796162.

The spelling of 67071967 in words is "sixty-seven million, seventy-one thousand, nine hundred sixty-seven".