561667105 has 8 divisors (see below), whose sum is σ = 674145000. Its totient is φ = 449237376.

The previous prime is 561667091. The next prime is 561667109. The reversal of 561667105 is 501766165.

It can be written as a sum of positive squares in 4 ways, for example, as 20034576 + 541632529 = 4476^2 + 23273^2 .

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 561667105 - 2⁷ = 561666977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561667109) 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 7 ways as a sum of consecutive naturals, for example, 22771 + ... + 40519.

It is an arithmetic number, because the mean of its divisors is an integer number (84268125).

Almost surely, 2^561667105 is an apocalyptic number.

It is an amenable number.

561667105 is a deficient number, since it is larger than the sum of its proper divisors (112477895).

561667105 is a wasteful number, since it uses less digits than its factorization.

561667105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24083.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 561667105 is about 23699.5169782002. The cubic root of 561667105 is about 825.0741800455.

The spelling of 561667105 in words is "five hundred sixty-one million, six hundred sixty-seven thousand, one hundred five".