6650729 has 2 divisors, whose sum is σ = 6650730. Its totient is φ = 6650728.

The previous prime is 6650717. The next prime is 6650731. The reversal of 6650729 is 9270566.

6650729 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., 5396329 + 1254400 = 2323^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 6650729 - 2¹⁶ = 6585193 is a prime.

Together with 6650731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6650629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325364 + 3325365.

It is an arithmetic number, because the mean of its divisors is an integer number (3325365).

Almost surely, 2^6650729 is an apocalyptic number.

It is an amenable number.

6650729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6650729 is an equidigital number, since it uses as much as digits as its factorization.

6650729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 6650729 is about 2578.9007348093. The cubic root of 6650729 is about 188.0571069158.

The spelling of 6650729 in words is "six million, six hundred fifty thousand, seven hundred twenty-nine".