10666115561 has 8 divisors (see below), whose sum is σ = 10776175200. Its totient is φ = 10556248288.

The previous prime is 10666115543. The next prime is 10666115573. The reversal of 10666115561 is 16551166601.

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

It is a cyclic number.

It is not a de Polignac number, because 10666115561 - 2²⁶ = 10599006697 is a prime.

It is a super-2 number, since 2×10666115561² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10666115501) 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, 64730 + ... + 159756.

It is an arithmetic number, because the mean of its divisors is an integer number (1347021900).

Almost surely, 2^10666115561 is an apocalyptic number.

It is an amenable number.

10666115561 is a deficient number, since it is larger than the sum of its proper divisors (110059639).

10666115561 is a wasteful number, since it uses less digits than its factorization.

10666115561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96183.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 10666115561 in words is "ten billion, six hundred sixty-six million, one hundred fifteen thousand, five hundred sixty-one".