11656066560665 has 4 divisors (see below), whose sum is σ = 13987279872804. Its totient is φ = 9324853248528.

The previous prime is 11656066560617. The next prime is 11656066560667. The reversal of 11656066560665 is 56606566065611.

It is a happy number.

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 1333590755344 + 10322475805321 = 1154812^2 + 3212861^2 .

It is a cyclic number.

It is not a de Polignac number, because 11656066560665 - 2¹⁸ = 11656066298521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11656066560667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165606656062 + ... + 1165606656071.

It is an arithmetic number, because the mean of its divisors is an integer number (3496819968201).

Almost surely, 2^{11656066560665} is an apocalyptic number.

It is an amenable number.

11656066560665 is a deficient number, since it is larger than the sum of its proper divisors (2331213312139).

11656066560665 is an equidigital number, since it uses as much as digits as its factorization.

11656066560665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331213312138.

The product of its (nonzero) digits is 34992000, while the sum is 59.

The spelling of 11656066560665 in words is "eleven trillion, six hundred fifty-six billion, sixty-six million, five hundred sixty thousand, six hundred sixty-five".