561088166 has 16 divisors (see below), whose sum is σ = 868841424. Its totient is φ = 271590144.

The previous prime is 561088141. The next prime is 561088193. The reversal of 561088166 is 661880165.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 19151 + ... + 38586.

It is an arithmetic number, because the mean of its divisors is an integer number (54302589).

Almost surely, 2^561088166 is an apocalyptic number.

561088166 is a deficient number, since it is larger than the sum of its proper divisors (307753258).

561088166 is a wasteful number, since it uses less digits than its factorization.

561088166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57895.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 561088166 is about 23687.2996772532. The cubic root of 561088166 is about 824.7906005436.

The spelling of 561088166 in words is "five hundred sixty-one million, eighty-eight thousand, one hundred sixty-six".