1116400665 has 8 divisors (see below), whose sum is σ = 1786241088. Its totient is φ = 595413680.

The previous prime is 1116400661. The next prime is 1116400679. The reversal of 1116400665 is 5660046111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1116400665 - 2² = 1116400661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1116400661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37213341 + ... + 37213370.

It is an arithmetic number, because the mean of its divisors is an integer number (223280136).

Almost surely, 2^1116400665 is an apocalyptic number.

1116400665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1116400665 is a deficient number, since it is larger than the sum of its proper divisors (669840423).

1116400665 is an equidigital number, since it uses as much as digits as its factorization.

1116400665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74426719.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1116400665 is about 33412.5824353641. The cubic root of 1116400665 is about 1037.3851547528.

Adding to 1116400665 its reverse (5660046111), we get a palindrome (6776446776).

The spelling of 1116400665 in words is "one billion, one hundred sixteen million, four hundred thousand, six hundred sixty-five".