10566111561 has 8 divisors (see below), whose sum is σ = 14088770304. Its totient is φ = 7043763600.

The previous prime is 10566111559. The next prime is 10566111581. The reversal of 10566111561 is 16511166501.

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

It is not a de Polignac number, because 10566111561 - 2¹ = 10566111559 is a prime.

It is a super-2 number, since 2×10566111561² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10566111551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18735 + ... + 146571.

It is an arithmetic number, because the mean of its divisors is an integer number (1761096288).

Almost surely, 2^10566111561 is an apocalyptic number.

It is an amenable number.

10566111561 is a deficient number, since it is larger than the sum of its proper divisors (3522658743).

10566111561 is a wasteful number, since it uses less digits than its factorization.

10566111561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155391.

The product of its (nonzero) digits is 5400, while the sum is 33.

The spelling of 10566111561 in words is "ten billion, five hundred sixty-six million, one hundred eleven thousand, five hundred sixty-one".