50686566 has 48 divisors (see below), whose sum is σ = 122310144. Its totient is φ = 13715568.

The previous prime is 50686561. The next prime is 50686567. The reversal of 50686566 is 66568605.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50686561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13491 + ... + 16833.

It is an arithmetic number, because the mean of its divisors is an integer number (2548128).

Almost surely, 2^50686566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50686566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61155072).

50686566 is an abundant number, since it is smaller than the sum of its proper divisors (71623578).

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

50686566 is a wasteful number, since it uses less digits than its factorization.

50686566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393 (or 3374 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 50686566 is about 7119.4498382951. The cubic root of 50686566 is about 370.0817107095.

The spelling of 50686566 in words is "fifty million, six hundred eighty-six thousand, five hundred sixty-six".