16666197 has 8 divisors (see below), whose sum is σ = 22241856. Its totient is φ = 11100672.

The previous prime is 16666163. The next prime is 16666201. The reversal of 16666197 is 79166661.

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

It is not a de Polignac number, because 16666197 - 2¹¹ = 16664149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3093 + ... + 6549.

It is an arithmetic number, because the mean of its divisors is an integer number (2780232).

Almost surely, 2^16666197 is an apocalyptic number.

It is an amenable number.

16666197 is a deficient number, since it is larger than the sum of its proper divisors (5575659).

16666197 is a wasteful number, since it uses less digits than its factorization.

16666197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5067.

The product of its digits is 81648, while the sum is 42.

The square root of 16666197 is about 4082.4253820493. The cubic root of 16666197 is about 255.4340780420.

The spelling of 16666197 in words is "sixteen million, six hundred sixty-six thousand, one hundred ninety-seven".