50121621666 has 32 divisors (see below), whose sum is σ = 116224053120. Its totient is φ = 15980806512.

The previous prime is 50121621629. The next prime is 50121621677. The reversal of 50121621666 is 66612612105.

50121621666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 50121621666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20176545 + ... + 20179028.

It is an arithmetic number, because the mean of its divisors is an integer number (3632001660).

Almost surely, 2^50121621666 is an apocalyptic number.

50121621666 is an abundant number, since it is smaller than the sum of its proper divisors (66102431454).

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

50121621666 is a wasteful number, since it uses less digits than its factorization.

50121621666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40355607 (or 40355601 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 50121621666 in words is "fifty billion, one hundred twenty-one million, six hundred twenty-one thousand, six hundred sixty-six".