67009561 has 8 divisors (see below), whose sum is σ = 71236800. Its totient is φ = 62852400.

The previous prime is 67009559. The next prime is 67009567. The reversal of 67009561 is 16590076.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67009561 - 2¹ = 67009559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67009567) 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 7 ways as a sum of consecutive naturals, for example, 15541 + ... + 19378.

It is an arithmetic number, because the mean of its divisors is an integer number (8904600).

Almost surely, 2^67009561 is an apocalyptic number.

It is an amenable number.

67009561 is a deficient number, since it is larger than the sum of its proper divisors (4227239).

67009561 is a wasteful number, since it uses less digits than its factorization.

67009561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35039.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 67009561 is about 8185.9367820672. The cubic root of 67009561 is about 406.1741287582.

It can be divided in two parts, 6700 and 9561, that added together give a palindrome (16261).

The spelling of 67009561 in words is "sixty-seven million, nine thousand, five hundred sixty-one".