50666878809 has 32 divisors (see below), whose sum is σ = 77007288960. Its totient is φ = 32913713664.

The previous prime is 50666878739. The next prime is 50666878819. The reversal of 50666878809 is 90887866605.

It is a de Polignac number, because none of the positive numbers 2^k-50666878809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50666878819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8737 + ... + 318449.

It is an arithmetic number, because the mean of its divisors is an integer number (2406477780).

Almost surely, 2^50666878809 is an apocalyptic number.

It is an amenable number.

50666878809 is a deficient number, since it is larger than the sum of its proper divisors (26340410151).

50666878809 is a wasteful number, since it uses less digits than its factorization.

50666878809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309878 (or 309872 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 50666878809 in words is "fifty billion, six hundred sixty-six million, eight hundred seventy-eight thousand, eight hundred nine".