10660561605665 has 32 divisors (see below), whose sum is σ = 13378259635200. Its totient is φ = 8148347311104.

The previous prime is 10660561605637. The next prime is 10660561605691. The reversal of 10660561605665 is 56650616506601.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10660561605665 - 2²⁰ = 10660560557089 is a prime.

It is a super-2 number, since 2×10660561605665² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327977 + ... + 4629113.

It is an arithmetic number, because the mean of its divisors is an integer number (418070613600).

Almost surely, 2^{10660561605665} is an apocalyptic number.

It is an amenable number.

10660561605665 is a deficient number, since it is larger than the sum of its proper divisors (2717698029535).

10660561605665 is a wasteful number, since it uses less digits than its factorization.

10660561605665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301441.

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 10660561605665 in words is "ten trillion, six hundred sixty billion, five hundred sixty-one million, six hundred five thousand, six hundred sixty-five".