6690350869 has 2 divisors, whose sum is σ = 6690350870. Its totient is φ = 6690350868.

The previous prime is 6690350831. The next prime is 6690350879. The reversal of 6690350869 is 9680530966.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3827030769 + 2863320100 = 61863^2 + 53510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6690350869 is a prime.

It is a super-2 number, since 2×6690350869² = 89521589500658110322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6690350819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345175434 + 3345175435.

It is an arithmetic number, because the mean of its divisors is an integer number (3345175435).

Almost surely, 2^6690350869 is an apocalyptic number.

It is an amenable number.

6690350869 is a deficient number, since it is larger than the sum of its proper divisors (1).

6690350869 is an equidigital number, since it uses as much as digits as its factorization.

6690350869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The square root of 6690350869 is about 81794.5650333810. The cubic root of 6690350869 is about 1884.2981923995.

The spelling of 6690350869 in words is "six billion, six hundred ninety million, three hundred fifty thousand, eight hundred sixty-nine".