67065605 has 4 divisors (see below), whose sum is σ = 80478732. Its totient is φ = 53652480.

The previous prime is 67065599. The next prime is 67065619. The reversal of 67065605 is 50656076.

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 14546596 + 52519009 = 3814^2 + 7247^2 .

It is not a de Polignac number, because 67065605 - 2⁴ = 67065589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 6706556 + ... + 6706565.

It is an arithmetic number, because the mean of its divisors is an integer number (20119683).

Almost surely, 2^67065605 is an apocalyptic number.

It is an amenable number.

67065605 is a deficient number, since it is larger than the sum of its proper divisors (13413127).

67065605 is a wasteful number, since it uses less digits than its factorization.

67065605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13413126.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 67065605 is about 8189.3592545449. The cubic root of 67065605 is about 406.2873329005.

The spelling of 67065605 in words is "sixty-seven million, sixty-five thousand, six hundred five".