561008421166 has 8 divisors (see below), whose sum is σ = 841986195120. Its totient is φ = 280346356128.

The previous prime is 561008421131. The next prime is 561008421191. The reversal of 561008421166 is 661124800165.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78922786 + ... + 78929893.

It is an arithmetic number, because the mean of its divisors is an integer number (105248274390).

Almost surely, 2^561008421166 is an apocalyptic number.

561008421166 is a deficient number, since it is larger than the sum of its proper divisors (280977773954).

561008421166 is a wasteful number, since it uses less digits than its factorization.

561008421166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157854458.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 561008421166 in words is "five hundred sixty-one billion, eight million, four hundred twenty-one thousand, one hundred sixty-six".