16505966 has 8 divisors (see below), whose sum is σ = 24781680. Its totient is φ = 8245408.

The previous prime is 16505921. The next prime is 16505969. The reversal of 16505966 is 66950561.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16505969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491 + ... + 5766.

It is an arithmetic number, because the mean of its divisors is an integer number (3097710).

Almost surely, 2^16505966 is an apocalyptic number.

16505966 is a deficient number, since it is larger than the sum of its proper divisors (8275714).

16505966 is a wasteful number, since it uses less digits than its factorization.

16505966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7578.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 16505966 is about 4062.7534997831. The cubic root of 16505966 is about 254.6128483657.

It can be divided in two parts, 16505 and 966, that added together give a palindrome (17471).

The spelling of 16505966 in words is "sixteen million, five hundred five thousand, nine hundred sixty-six".