6650869 has 2 divisors, whose sum is σ = 6650870. Its totient is φ = 6650868.

The previous prime is 6650867. The next prime is 6650909. The reversal of 6650869 is 9680566.

It is an a-pointer prime, because the next prime (6650909) can be obtained adding 6650869 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6563844 + 87025 = 2562^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 6650869 - 2¹ = 6650867 is a prime.

It is a super-2 number, since 2×6650869² = 88468116910322, which contains 22 as substring.

Together with 6650867, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6650867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325434 + 3325435.

It is an arithmetic number, because the mean of its divisors is an integer number (3325435).

Almost surely, 2^6650869 is an apocalyptic number.

It is an amenable number.

6650869 is a deficient number, since it is larger than the sum of its proper divisors (1).

6650869 is an equidigital number, since it uses as much as digits as its factorization.

6650869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 6650869 is about 2578.9278780144. The cubic root of 6650869 is about 188.0584264609.

The spelling of 6650869 in words is "six million, six hundred fifty thousand, eight hundred sixty-nine".