16866398 has 8 divisors (see below), whose sum is σ = 25467600. Its totient is φ = 8377200.

The previous prime is 16866391. The next prime is 16866419. The reversal of 16866398 is 89366861.

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 (16866391) 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, 27623 + ... + 28226.

It is an arithmetic number, because the mean of its divisors is an integer number (3183450).

Almost surely, 2^16866398 is an apocalyptic number.

16866398 is a deficient number, since it is larger than the sum of its proper divisors (8601202).

16866398 is a wasteful number, since it uses less digits than its factorization.

16866398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56002.

The product of its digits is 373248, while the sum is 47.

The square root of 16866398 is about 4106.8720457302. The cubic root of 16866398 is about 256.4528017404.

It can be divided in two parts, 168 and 66398, that added together give a palindrome (66566).

The spelling of 16866398 in words is "sixteen million, eight hundred sixty-six thousand, three hundred ninety-eight".