16660919 has 8 divisors (see below), whose sum is σ = 18762240. Its totient is φ = 14657400.

The previous prime is 16660913. The next prime is 16660933. The reversal of 16660919 is 91906661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16660919 is a prime.

It is a super-2 number, since 2×16660919² = 555172443849122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16660913) 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 7 ways as a sum of consecutive naturals, for example, 24089 + ... + 24770.

It is an arithmetic number, because the mean of its divisors is an integer number (2345280).

Almost surely, 2^16660919 is an apocalyptic number.

16660919 is a deficient number, since it is larger than the sum of its proper divisors (2101321).

16660919 is a wasteful number, since it uses less digits than its factorization.

16660919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48901.

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

The square root of 16660919 is about 4081.7789014105. The cubic root of 16660919 is about 255.4071108139.

The spelling of 16660919 in words is "sixteen million, six hundred sixty thousand, nine hundred nineteen".