11665965 has 8 divisors (see below), whose sum is σ = 18665568. Its totient is φ = 6221840.

The previous prime is 11665963. The next prime is 11666021. The reversal of 11665965 is 56956611.

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

It is not a de Polignac number, because 11665965 - 2¹ = 11665963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11665963) 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, 388851 + ... + 388880.

It is an arithmetic number, because the mean of its divisors is an integer number (2333196).

Almost surely, 2^11665965 is an apocalyptic number.

11665965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11665965 is a deficient number, since it is larger than the sum of its proper divisors (6999603).

11665965 is an equidigital number, since it uses as much as digits as its factorization.

11665965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777739.

The product of its digits is 48600, while the sum is 39.

The square root of 11665965 is about 3415.5475402928. The cubic root of 11665965 is about 226.7985235791.

The spelling of 11665965 in words is "eleven million, six hundred sixty-five thousand, nine hundred sixty-five".