67945678 has 4 divisors (see below), whose sum is σ = 101918520. Its totient is φ = 33972838.

The previous prime is 67945673. The next prime is 67945679. The reversal of 67945678 is 87654976.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67945673) 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 as a sum of consecutive naturals, namely, 16986418 + ... + 16986421.

It is an arithmetic number, because the mean of its divisors is an integer number (25479630).

Almost surely, 2^67945678 is an apocalyptic number.

67945678 is a deficient number, since it is larger than the sum of its proper divisors (33972842).

67945678 is a wasteful number, since it uses less digits than its factorization.

67945678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33972841.

The product of its digits is 2540160, while the sum is 52.

The square root of 67945678 is about 8242.9168381102. The cubic root of 67945678 is about 408.0567931642.

The spelling of 67945678 in words is "sixty-seven million, nine hundred forty-five thousand, six hundred seventy-eight".