16091966 has 32 divisors (see below), whose sum is σ = 27628128. Its totient is φ = 6963840.

The previous prime is 16091963. The next prime is 16091987. The reversal of 16091966 is 66919061.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16091963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42956 + ... + 43328.

It is an arithmetic number, because the mean of its divisors is an integer number (863379).

Almost surely, 2^16091966 is an apocalyptic number.

16091966 is a deficient number, since it is larger than the sum of its proper divisors (11536162).

16091966 is a wasteful number, since it uses less digits than its factorization.

16091966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 16091966 is about 4011.4792782713. The cubic root of 16091966 is about 252.4660791606.

The spelling of 16091966 in words is "sixteen million, ninety-one thousand, nine hundred sixty-six".