50665986 has 96 divisors (see below), whose sum is σ = 133031808. Its totient is φ = 14152320.

The previous prime is 50665981. The next prime is 50665999. The reversal of 50665986 is 68956605.

50665986 is a `hidden beast` number, since 50 + 6 + 6 + 598 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (50665981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 180166 + ... + 180446.

It is an arithmetic number, because the mean of its divisors is an integer number (1385748).

Almost surely, 2^50665986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50665986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66515904).

50665986 is an abundant number, since it is smaller than the sum of its proper divisors (82365822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

50665986 is a wasteful number, since it uses less digits than its factorization.

50665986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 50665986 is about 7118.0043551546. The cubic root of 50665986 is about 370.0316164851.

The spelling of 50665986 in words is "fifty million, six hundred sixty-five thousand, nine hundred eighty-six".