6551689 has 2 divisors, whose sum is σ = 6551690. Its totient is φ = 6551688.

The previous prime is 6551653. The next prime is 6551693. The reversal of 6551689 is 9861556.

6551689 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5359225 + 1192464 = 2315^2 + 1092^2 .

It is a cyclic number.

It is not a de Polignac number, because 6551689 - 2⁹ = 6551177 is a prime.

It is not a weakly prime, because it can be changed into another prime (6551639) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275844 + 3275845.

It is an arithmetic number, because the mean of its divisors is an integer number (3275845).

Almost surely, 2^6551689 is an apocalyptic number.

It is an amenable number.

6551689 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551689 is an equidigital number, since it uses as much as digits as its factorization.

6551689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The square root of 6551689 is about 2559.6267305996. The cubic root of 6551689 is about 187.1189440311.

The spelling of 6551689 in words is "six million, five hundred fifty-one thousand, six hundred eighty-nine".