50666813 has 2 divisors, whose sum is σ = 50666814. Its totient is φ = 50666812.

The previous prime is 50666809. The next prime is 50666821. The reversal of 50666813 is 31866605.

50666813 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., 38402809 + 12264004 = 6197^2 + 3502^2 .

It is a cyclic number.

It is not a de Polignac number, because 50666813 - 2² = 50666809 is a prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50666113) 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, 25333406 + 25333407.

It is an arithmetic number, because the mean of its divisors is an integer number (25333407).

Almost surely, 2^50666813 is an apocalyptic number.

It is an amenable number.

50666813 is a deficient number, since it is larger than the sum of its proper divisors (1).

50666813 is an equidigital number, since it uses as much as digits as its factorization.

50666813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 50666813 is about 7118.0624470427. The cubic root of 50666813 is about 370.0336297653.

The spelling of 50666813 in words is "fifty million, six hundred sixty-six thousand, eight hundred thirteen".