561166726 has 8 divisors (see below), whose sum is σ = 842873184. Its totient is φ = 280209000.

The previous prime is 561166721. The next prime is 561166751. The reversal of 561166726 is 627661165.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561166721) 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, 185305 + ... + 188308.

It is an arithmetic number, because the mean of its divisors is an integer number (105359148).

Almost surely, 2^561166726 is an apocalyptic number.

561166726 is a deficient number, since it is larger than the sum of its proper divisors (281706458).

561166726 is a wasteful number, since it uses less digits than its factorization.

561166726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374366.

The product of its digits is 90720, while the sum is 40.

The square root of 561166726 is about 23688.9578918111. The cubic root of 561166726 is about 824.8290927270.

The spelling of 561166726 in words is "five hundred sixty-one million, one hundred sixty-six thousand, seven hundred twenty-six".