10611566065 has 4 divisors (see below), whose sum is σ = 12733879284. Its totient is φ = 8489252848.

The previous prime is 10611566029. The next prime is 10611566081. The reversal of 10611566065 is 56066511601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6768681984 + 3842884081 = 82272^2 + 61991^2 .

It is a cyclic number.

It is not a de Polignac number, because 10611566065 - 2²⁷ = 10477348337 is a prime.

It is a super-2 number, since 2×10611566065² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061156602 + ... + 1061156611.

It is an arithmetic number, because the mean of its divisors is an integer number (3183469821).

Almost surely, 2^10611566065 is an apocalyptic number.

It is an amenable number.

10611566065 is a deficient number, since it is larger than the sum of its proper divisors (2122313219).

10611566065 is an equidigital number, since it uses as much as digits as its factorization.

10611566065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122313218.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 10611566065 in words is "ten billion, six hundred eleven million, five hundred sixty-six thousand, sixty-five".