67078145 has 4 divisors (see below), whose sum is σ = 80493780. Its totient is φ = 53662512.

The previous prime is 67078139. The next prime is 67078147. The reversal of 67078145 is 54187076.

67078145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8111104 + 58967041 = 2848^2 + 7679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67078145 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 67078099 and 67078108.

It is not an unprimeable number, because it can be changed into a prime (67078147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6707810 + ... + 6707819.

It is an arithmetic number, because the mean of its divisors is an integer number (20123445).

Almost surely, 2^67078145 is an apocalyptic number.

It is an amenable number.

67078145 is a deficient number, since it is larger than the sum of its proper divisors (13415635).

67078145 is a wasteful number, since it uses less digits than its factorization.

67078145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13415634.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 67078145 is about 8190.1248464233. The cubic root of 67078145 is about 406.3126540053.

The spelling of 67078145 in words is "sixty-seven million, seventy-eight thousand, one hundred forty-five".