16981606 has 8 divisors (see below), whose sum is σ = 26970840. Its totient is φ = 7991328.

The previous prime is 16981577. The next prime is 16981609. The reversal of 16981606 is 60618961.

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 (16981609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249696 + ... + 249763.

It is an arithmetic number, because the mean of its divisors is an integer number (3371355).

Almost surely, 2^16981606 is an apocalyptic number.

16981606 is a deficient number, since it is larger than the sum of its proper divisors (9989234).

16981606 is a wasteful number, since it uses less digits than its factorization.

16981606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499478.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 16981606 is about 4120.8744217702. The cubic root of 16981606 is about 257.0353880423.

The spelling of 16981606 in words is "sixteen million, nine hundred eighty-one thousand, six hundred six".