66116505650 has 48 divisors (see below), whose sum is σ = 133447583808. Its totient is φ = 24225864000.

The previous prime is 66116505641. The next prime is 66116505683. The reversal of 66116505650 is 5650561166.

66116505650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66116505598 and 66116505607.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 303086 + ... + 473385.

It is an arithmetic number, because the mean of its divisors is an integer number (2780157996).

Almost surely, 2^66116505650 is an apocalyptic number.

66116505650 is an abundant number, since it is smaller than the sum of its proper divisors (67331078158).

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

66116505650 is a wasteful number, since it uses less digits than its factorization.

66116505650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776627 (or 776622 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 66116505650 in words is "sixty-six billion, one hundred sixteen million, five hundred five thousand, six hundred fifty".