50665616478 has 20 divisors (see below), whose sum is σ = 113528511360. Its totient is φ = 16888538772.

The previous prime is 50665616437. The next prime is 50665616483. The reversal of 50665616478 is 87461656605.

50665616478 is a `hidden beast` number, since 5 + 0 + 6 + 6 + 561 + 6 + 4 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 156375198 + ... + 156375521.

It is an arithmetic number, because the mean of its divisors is an integer number (5676425568).

Almost surely, 2^50665616478 is an apocalyptic number.

50665616478 is an abundant number, since it is smaller than the sum of its proper divisors (62862894882).

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

50665616478 is a wasteful number, since it uses less digits than its factorization.

50665616478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312750733 (or 312750724 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 50665616478 in words is "fifty billion, six hundred sixty-five million, six hundred sixteen thousand, four hundred seventy-eight".