2165966 has 8 divisors (see below), whose sum is σ = 3544344. Its totient is φ = 984520.

The previous prime is 2165963. The next prime is 2165971. The reversal of 2165966 is 6695612.

It is a happy number.

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

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49205 + ... + 49248.

It is an arithmetic number, because the mean of its divisors is an integer number (443043).

2^2165966 is an apocalyptic number.

2165966 is a deficient number, since it is larger than the sum of its proper divisors (1378378).

2165966 is a wasteful number, since it uses less digits than its factorization.

2165966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98466.

The product of its digits is 19440, while the sum is 35.

The square root of 2165966 is about 1471.7221205105. The cubic root of 2165966 is about 129.3849845655.

The spelling of 2165966 in words is "two million, one hundred sixty-five thousand, nine hundred sixty-six".