16689659 has 8 divisors (see below), whose sum is σ = 19131648. Its totient is φ = 14262120.

The previous prime is 16689649. The next prime is 16689683. The reversal of 16689659 is 95698661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16689659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16689649) 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, 1007 + ... + 5864.

It is an arithmetic number, because the mean of its divisors is an integer number (2391456).

Almost surely, 2^16689659 is an apocalyptic number.

16689659 is a deficient number, since it is larger than the sum of its proper divisors (2441989).

16689659 is an equidigital number, since it uses as much as digits as its factorization.

16689659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7225.

The product of its digits is 699840, while the sum is 50.

The square root of 16689659 is about 4085.2979083538. The cubic root of 16689659 is about 255.5538851043.

The spelling of 16689659 in words is "sixteen million, six hundred eighty-nine thousand, six hundred fifty-nine".