6690269 has 2 divisors, whose sum is σ = 6690270. Its totient is φ = 6690268.

The previous prime is 6690251. The next prime is 6690289. The reversal of 6690269 is 9620966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3496900 + 3193369 = 1870^2 + 1787^2 .

It is a cyclic number.

It is not a de Polignac number, because 6690269 - 2¹⁶ = 6624733 is a prime.

It is a super-2 number, since 2×6690269² = 89519398584722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6690239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345134 + 3345135.

It is an arithmetic number, because the mean of its divisors is an integer number (3345135).

Almost surely, 2^6690269 is an apocalyptic number.

It is an amenable number.

6690269 is a deficient number, since it is larger than the sum of its proper divisors (1).

6690269 is an equidigital number, since it uses as much as digits as its factorization.

6690269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 6690269 is about 2586.5554314571. Note that the first 3 decimals coincide. The cubic root of 6690269 is about 188.4290506393.

The spelling of 6690269 in words is "six million, six hundred ninety thousand, two hundred sixty-nine".