65516616166 has 24 divisors (see below), whose sum is σ = 104603864400. Its totient is φ = 30769917312.

The previous prime is 65516616103. The next prime is 65516616199. The reversal of 65516616166 is 66161661556.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178060 + ... + 403408.

It is an arithmetic number, because the mean of its divisors is an integer number (4358494350).

Almost surely, 2^65516616166 is an apocalyptic number.

65516616166 is a deficient number, since it is larger than the sum of its proper divisors (39087248234).

65516616166 is a wasteful number, since it uses less digits than its factorization.

65516616166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225888 (or 225871 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 49.

The spelling of 65516616166 in words is "sixty-five billion, five hundred sixteen million, six hundred sixteen thousand, one hundred sixty-six".