11665617601 has 8 divisors (see below), whose sum is σ = 12790730304. Its totient is φ = 10551271920.

The previous prime is 11665617589. The next prime is 11665617661. The reversal of 11665617601 is 10671656611.

11665617601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11665617601 - 2¹⁷ = 11665486529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11665617661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2689485 + ... + 2693818.

It is an arithmetic number, because the mean of its divisors is an integer number (1598841288).

Almost surely, 2^11665617601 is an apocalyptic number.

11665617601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11665617601 is a deficient number, since it is larger than the sum of its proper divisors (1125112703).

11665617601 is a wasteful number, since it uses less digits than its factorization.

11665617601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5383511.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 11665617601 in words is "eleven billion, six hundred sixty-five million, six hundred seventeen thousand, six hundred one".