111605663665 has 8 divisors (see below), whose sum is σ = 133930316520. Its totient is φ = 89282184192.

The previous prime is 111605663621. The next prime is 111605663753. The reversal of 111605663665 is 566366506111.

It can be written as a sum of positive squares in 4 ways, for example, as 50161665024 + 61443998641 = 223968^2 + 247879^2 .

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 111605663665 - 2²¹ = 111603566513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68410 + ... + 477379.

It is an arithmetic number, because the mean of its divisors is an integer number (16741289565).

Almost surely, 2^111605663665 is an apocalyptic number.

It is an amenable number.

111605663665 is a deficient number, since it is larger than the sum of its proper divisors (22324652855).

111605663665 is an equidigital number, since it uses as much as digits as its factorization.

111605663665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586691.

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 111605663665 in words is "one hundred eleven billion, six hundred five million, six hundred sixty-three thousand, six hundred sixty-five".