50666909 has 2 divisors, whose sum is σ = 50666910. Its totient is φ = 50666908.

The previous prime is 50666881. The next prime is 50666951. The reversal of 50666909 is 90966605.

50666909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28783225 + 21883684 = 5365^2 + 4678^2 .

It is a cyclic number.

It is not a de Polignac number, because 50666909 - 2²⁴ = 33889693 is a prime.

It is a super-2 number, since 2×50666909² = 5134271335228562, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50666809) 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, 25333454 + 25333455.

It is an arithmetic number, because the mean of its divisors is an integer number (25333455).

Almost surely, 2^50666909 is an apocalyptic number.

It is an amenable number.

50666909 is a deficient number, since it is larger than the sum of its proper divisors (1).

50666909 is an equidigital number, since it uses as much as digits as its factorization.

50666909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 50666909 is about 7118.0691904476. The cubic root of 50666909 is about 370.0338634699.

The spelling of 50666909 in words is "fifty million, six hundred sixty-six thousand, nine hundred nine".