6628261 has 2 divisors, whose sum is σ = 6628262. Its totient is φ = 6628260.

The previous prime is 6628253. The next prime is 6628267. The reversal of 6628261 is 1628266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3802500 + 2825761 = 1950^2 + 1681^2 .

It is a cyclic number.

It is not a de Polignac number, because 6628261 - 2³ = 6628253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6628267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3314130 + 3314131.

It is an arithmetic number, because the mean of its divisors is an integer number (3314131).

Almost surely, 2^6628261 is an apocalyptic number.

It is an amenable number.

6628261 is a deficient number, since it is larger than the sum of its proper divisors (1).

6628261 is an equidigital number, since it uses as much as digits as its factorization.

6628261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 6628261 is about 2574.5409299524. The cubic root of 6628261 is about 187.8450983742.

It can be divided in two parts, 6628 and 261, that added together give a square (6889 = 83²).

The spelling of 6628261 in words is "six million, six hundred twenty-eight thousand, two hundred sixty-one".