561205066 has 8 divisors (see below), whose sum is σ = 843283584. Its totient is φ = 280110540.

The previous prime is 561205061. The next prime is 561205067. The reversal of 561205066 is 660502165.

561205066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×561205066² = 629902252208128712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (561205061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244570 + ... + 246853.

It is an arithmetic number, because the mean of its divisors is an integer number (105410448).

Almost surely, 2^561205066 is an apocalyptic number.

561205066 is a deficient number, since it is larger than the sum of its proper divisors (282078518).

561205066 is a wasteful number, since it uses less digits than its factorization.

561205066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491996.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 561205066 is about 23689.7671157823. The cubic root of 561205066 is about 824.8478769408.

The spelling of 561205066 in words is "five hundred sixty-one million, two hundred five thousand, sixty-six".