6669281 has 2 divisors, whose sum is σ = 6669282. Its totient is φ = 6669280.

The previous prime is 6669269. The next prime is 6669293. The reversal of 6669281 is 1829666.

It is a balanced prime because it is at equal distance from previous prime (6669269) and next prime (6669293).

It can be written as a sum of positive squares in only one way, i.e., 4080400 + 2588881 = 2020^2 + 1609^2 .

It is a cyclic number.

It is not a de Polignac number, because 6669281 - 2¹⁰ = 6668257 is a prime.

It is a super-2 number, since 2×6669281² = 88958618113922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6669251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334640 + 3334641.

It is an arithmetic number, because the mean of its divisors is an integer number (3334641).

Almost surely, 2^6669281 is an apocalyptic number.

It is an amenable number.

6669281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6669281 is an equidigital number, since it uses as much as digits as its factorization.

6669281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 6669281 is about 2582.4951113216. The cubic root of 6669281 is about 188.2318043796.

The spelling of 6669281 in words is "six million, six hundred sixty-nine thousand, two hundred eighty-one".