16688851 has 2 divisors, whose sum is σ = 16688852. Its totient is φ = 16688850.

The previous prime is 16688843. The next prime is 16688863. The reversal of 16688851 is 15888661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16688851 - 2³ = 16688843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16688798 and 16688807.

It is not a weakly prime, because it can be changed into another prime (16688801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8344425 + 8344426.

It is an arithmetic number, because the mean of its divisors is an integer number (8344426).

Almost surely, 2^16688851 is an apocalyptic number.

16688851 is a deficient number, since it is larger than the sum of its proper divisors (1).

16688851 is an equidigital number, since it uses as much as digits as its factorization.

16688851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 43.

The square root of 16688851 is about 4085.1990159599. The cubic root of 16688851 is about 255.5497609762.

The spelling of 16688851 in words is "sixteen million, six hundred eighty-eight thousand, eight hundred fifty-one".