561166075 has 12 divisors (see below), whose sum is σ = 726100848. Its totient is φ = 429413600.

The previous prime is 561166031. The next prime is 561166079. The reversal of 561166075 is 570661165.

It is not a de Polignac number, because 561166075 - 2¹¹ = 561164027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561166079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 487396 + ... + 488545.

It is an arithmetic number, because the mean of its divisors is an integer number (60508404).

Almost surely, 2^561166075 is an apocalyptic number.

561166075 is a deficient number, since it is larger than the sum of its proper divisors (164934773).

561166075 is a wasteful number, since it uses less digits than its factorization.

561166075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975974 (or 975969 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 561166075 is about 23688.9441512280. The cubic root of 561166075 is about 824.8287737702.

It can be divided in two parts, 561 and 166075, that multiplied together give a triangular number (93168075 = T₁₃₆₅₀).

The spelling of 561166075 in words is "five hundred sixty-one million, one hundred sixty-six thousand, seventy-five".