1165668681 has 8 divisors (see below), whose sum is σ = 1621800000. Its totient is φ = 743324912.

The previous prime is 1165668661. The next prime is 1165668701. The reversal of 1165668681 is 1868665611.

It is an interprime number because it is at equal distance from previous prime (1165668661) and next prime (1165668701).

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 1165668681 - 2⁶ = 1165668617 is a prime.

It is a super-2 number, since 2×1165668681² = 2717566947728559522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1165668681.

It is not an unprimeable number, because it can be changed into a prime (1165668661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8446806 + ... + 8446943.

It is an arithmetic number, because the mean of its divisors is an integer number (202725000).

Almost surely, 2^1165668681 is an apocalyptic number.

It is an amenable number.

1165668681 is a deficient number, since it is larger than the sum of its proper divisors (456131319).

1165668681 is a wasteful number, since it uses less digits than its factorization.

1165668681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16893775.

The product of its digits is 414720, while the sum is 48.

The square root of 1165668681 is about 34141.8904133910. The cubic root of 1165668681 is about 1052.4263408185.

The spelling of 1165668681 in words is "one billion, one hundred sixty-five million, six hundred sixty-eight thousand, six hundred eighty-one".