67068809 has 4 divisors (see below), whose sum is σ = 68069904. Its totient is φ = 66067716.

The previous prime is 67068787. The next prime is 67068839. The reversal of 67068809 is 90886076.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67068809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67068809.

It is not an unprimeable number, because it can be changed into a prime (67068839) 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 in 3 ways as a sum of consecutive naturals, for example, 500447 + ... + 500580.

It is an arithmetic number, because the mean of its divisors is an integer number (17017476).

Almost surely, 2^67068809 is an apocalyptic number.

It is an amenable number.

67068809 is a deficient number, since it is larger than the sum of its proper divisors (1001095).

67068809 is a wasteful number, since it uses less digits than its factorization.

67068809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001094.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 67068809 is about 8189.5548719085. The cubic root of 67068809 is about 406.2938028035.

The spelling of 67068809 in words is "sixty-seven million, sixty-eight thousand, eight hundred nine".