505100061666 has 96 divisors (see below), whose sum is σ = 1156536912960. Its totient is φ = 159111050112.

The previous prime is 505100061617. The next prime is 505100061673. The reversal of 505100061666 is 666160001505.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 505100061666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5076936 + ... + 5175468.

It is an arithmetic number, because the mean of its divisors is an integer number (12047259510).

Almost surely, 2^505100061666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505100061666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (578268456480).

505100061666 is an abundant number, since it is smaller than the sum of its proper divisors (651436851294).

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

505100061666 is a wasteful number, since it uses less digits than its factorization.

505100061666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98800 (or 98797 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 505100061666 in words is "five hundred five billion, one hundred million, sixty-one thousand, six hundred sixty-six".