11774118665 has 4 divisors (see below), whose sum is σ = 14128942404. Its totient is φ = 9419294928.

The previous prime is 11774118641. The next prime is 11774118667. The reversal of 11774118665 is 56681147711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56681147711 = 6067 ⋅9342533.

It can be written as a sum of positive squares in 2 ways, for example, as 4909664761 + 6864453904 = 70069^2 + 82852^2 .

It is a cyclic number.

It is not a de Polignac number, because 11774118665 - 2¹⁶ = 11774053129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11774118667) 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, 1177411862 + ... + 1177411871.

It is an arithmetic number, because the mean of its divisors is an integer number (3532235601).

Almost surely, 2^11774118665 is an apocalyptic number.

It is an amenable number.

11774118665 is a deficient number, since it is larger than the sum of its proper divisors (2354823739).

11774118665 is an equidigital number, since it uses as much as digits as its factorization.

11774118665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354823738.

The product of its digits is 282240, while the sum is 47.

The spelling of 11774118665 in words is "eleven billion, seven hundred seventy-four million, one hundred eighteen thousand, six hundred sixty-five".