117665805 has 8 divisors (see below), whose sum is σ = 188265312. Its totient is φ = 62755088.

The previous prime is 117665791. The next prime is 117665813. The reversal of 117665805 is 508566711.

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 117665805 - 2¹¹ = 117663757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3922179 + ... + 3922208.

It is an arithmetic number, because the mean of its divisors is an integer number (23533164).

Almost surely, 2^117665805 is an apocalyptic number.

117665805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117665805 is a deficient number, since it is larger than the sum of its proper divisors (70599507).

117665805 is an equidigital number, since it uses as much as digits as its factorization.

117665805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7844395.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 117665805 is about 10847.3870125482. The cubic root of 117665805 is about 490.0233294460.

It can be divided in two parts, 11766 and 5805, that added together give a palindrome (17571).

The spelling of 117665805 in words is "one hundred seventeen million, six hundred sixty-five thousand, eight hundred five".