67108561 has 8 divisors (see below), whose sum is σ = 73289664. Its totient is φ = 61073040.

The previous prime is 67108529. The next prime is 67108579. The reversal of 67108561 is 16580176.

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 67108561 - 2⁵ = 67108529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67108511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35431 + ... + 37276.

It is an arithmetic number, because the mean of its divisors is an integer number (9161208).

Almost surely, 2^67108561 is an apocalyptic number.

It is an amenable number.

67108561 is a deficient number, since it is larger than the sum of its proper divisors (6181103).

67108561 is a wasteful number, since it uses less digits than its factorization.

67108561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72791.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 67108561 is about 8191.9815063268. The cubic root of 67108561 is about 406.3740577020.

The spelling of 67108561 in words is "sixty-seven million, one hundred eight thousand, five hundred sixty-one".