65516166220156 has 12 divisors (see below), whose sum is σ = 115490176221168. Its totient is φ = 32518973014112.

The previous prime is 65516166220147. The next prime is 65516166220157. The reversal of 65516166220156 is 65102266161556.

It is a super-2 number, since 2×65516166220156² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65516166220157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59777523376 + ... + 59777524471.

It is an arithmetic number, because the mean of its divisors is an integer number (9624181351764).

Almost surely, 2^{65516166220156} is an apocalyptic number.

It is an amenable number.

65516166220156 is a deficient number, since it is larger than the sum of its proper divisors (49974010001012).

65516166220156 is a wasteful number, since it uses less digits than its factorization.

65516166220156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119555047988 (or 119555047986 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 52.

The spelling of 65516166220156 in words is "sixty-five trillion, five hundred sixteen billion, one hundred sixty-six million, two hundred twenty thousand, one hundred fifty-six".