16667889 has 24 divisors (see below), whose sum is σ = 26232768. Its totient is φ = 9384480.

The previous prime is 16667879. The next prime is 16667897. The reversal of 16667889 is 98876661.

It is a happy number.

It is not a de Polignac number, because 16667889 - 2⁵ = 16667857 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (16667869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9639 + ... + 11235.

It is an arithmetic number, because the mean of its divisors is an integer number (1093032).

Almost surely, 2^16667889 is an apocalyptic number.

It is an amenable number.

16667889 is a deficient number, since it is larger than the sum of its proper divisors (9564879).

16667889 is a wasteful number, since it uses less digits than its factorization.

16667889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685 (or 1678 counting only the distinct ones).

The product of its digits is 870912, while the sum is 51.

The square root of 16667889 is about 4082.6326065420. The cubic root of 16667889 is about 255.4427218823.

The spelling of 16667889 in words is "sixteen million, six hundred sixty-seven thousand, eight hundred eighty-nine".