11671665 has 8 divisors (see below), whose sum is σ = 18674688. Its totient is φ = 6224880.

The previous prime is 11671663. The next prime is 11671711. The reversal of 11671665 is 56617611.

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

It is not a de Polignac number, because 11671665 - 2¹ = 11671663 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (11671663) 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, 389041 + ... + 389070.

It is an arithmetic number, because the mean of its divisors is an integer number (2334336).

Almost surely, 2^11671665 is an apocalyptic number.

11671665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11671665 is a deficient number, since it is larger than the sum of its proper divisors (7003023).

11671665 is an equidigital number, since it uses as much as digits as its factorization.

11671665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778119.

The product of its digits is 7560, while the sum is 33.

The square root of 11671665 is about 3416.3818580481. The cubic root of 11671665 is about 226.8354555458.

The spelling of 11671665 in words is "eleven million, six hundred seventy-one thousand, six hundred sixty-five".