16689611 has 2 divisors, whose sum is σ = 16689612. Its totient is φ = 16689610.

The previous prime is 16689599. The next prime is 16689623. The reversal of 16689611 is 11698661.

It is a balanced prime because it is at equal distance from previous prime (16689599) and next prime (16689623).

It is a cyclic number.

It is not a de Polignac number, because 16689611 - 2¹⁴ = 16673227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16689691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8344805 + 8344806.

It is an arithmetic number, because the mean of its divisors is an integer number (8344806).

Almost surely, 2^16689611 is an apocalyptic number.

16689611 is a deficient number, since it is larger than the sum of its proper divisors (1).

16689611 is an equidigital number, since it uses as much as digits as its factorization.

16689611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 16689611 is about 4085.2920336250. The cubic root of 16689611 is about 255.5536401103.

The spelling of 16689611 in words is "sixteen million, six hundred eighty-nine thousand, six hundred eleven".