16666089 has 8 divisors (see below), whose sum is σ = 24241632. Its totient is φ = 10100640.

The previous prime is 16666081. The next prime is 16666093. The reversal of 16666089 is 98066661.

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

It is not a de Polignac number, because 16666089 - 2³ = 16666081 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16666089.

It is not an unprimeable number, because it can be changed into a prime (16666081) 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, 252484 + ... + 252549.

It is an arithmetic number, because the mean of its divisors is an integer number (3030204).

Almost surely, 2^16666089 is an apocalyptic number.

It is an amenable number.

16666089 is a deficient number, since it is larger than the sum of its proper divisors (7575543).

16666089 is a wasteful number, since it uses less digits than its factorization.

16666089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505047.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 16666089 is about 4082.4121545968. The cubic root of 16666089 is about 255.4335262877.

The spelling of 16666089 in words is "sixteen million, six hundred sixty-six thousand, eighty-nine".