561001066 has 8 divisors (see below), whose sum is σ = 849833604. Its totient is φ = 277723200.

The previous prime is 561001057. The next prime is 561001109. The reversal of 561001066 is 660100165.

It can be written as a sum of positive squares in 2 ways, for example, as 371140225 + 189860841 = 19265^2 + 13779^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 561001066.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1388415 + ... + 1388818.

Almost surely, 2^561001066 is an apocalyptic number.

561001066 is a deficient number, since it is larger than the sum of its proper divisors (288832538).

561001066 is a wasteful number, since it uses less digits than its factorization.

561001066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777336.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 561001066 is about 23685.4610679210. The cubic root of 561001066 is about 824.7479198009.

Subtracting 561001066 from its reverse (660100165), we obtain a palindrome (99099099).

The spelling of 561001066 in words is "five hundred sixty-one million, one thousand, sixty-six".