561660075 has 30 divisors (see below), whose sum is σ = 1040392364. Its totient is φ = 299550960.

The previous prime is 561660061. The next prime is 561660089. The reversal of 561660075 is 570066165.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (561660061) and next prime (561660089).

It is not a de Polignac number, because 561660075 - 2⁷ = 561659947 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 136657 + ... + 140706.

Almost surely, 2^561660075 is an apocalyptic number.

561660075 is a deficient number, since it is larger than the sum of its proper divisors (478732289).

561660075 is a wasteful number, since it uses less digits than its factorization.

561660075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277385 (or 277371 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 561660075 is about 23699.3686624771. The cubic root of 561660075 is about 825.0707377362.

The spelling of 561660075 in words is "five hundred sixty-one million, six hundred sixty thousand, seventy-five".