561166730 has 8 divisors (see below), whose sum is σ = 1010100132. Its totient is φ = 224466688.

The previous prime is 561166721. The next prime is 561166751. The reversal of 561166730 is 37661165.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 515698681 + 45468049 = 22709^2 + 6743^2 .

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

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, 28058327 + ... + 28058346.

Almost surely, 2^561166730 is an apocalyptic number.

561166730 is a deficient number, since it is larger than the sum of its proper divisors (448933402).

561166730 is a wasteful number, since it uses less digits than its factorization.

561166730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56116680.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 561166730 is about 23688.9579762386. The cubic root of 561166730 is about 824.8290946868.

The spelling of 561166730 in words is "five hundred sixty-one million, one hundred sixty-six thousand, seven hundred thirty".