65000166016 has 64 divisors (see below), whose sum is σ = 132793473600. Its totient is φ = 31681914880.

The previous prime is 65000166013. The next prime is 65000166041. The reversal of 65000166016 is 61066100056.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×65000166016² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65000166013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768651 + ... + 849013.

It is an arithmetic number, because the mean of its divisors is an integer number (2074898025).

Almost surely, 2^65000166016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65000166016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66396736800).

65000166016 is an abundant number, since it is smaller than the sum of its proper divisors (67793307584).

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

65000166016 is an equidigital number, since it uses as much as digits as its factorization.

65000166016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80537 (or 80525 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 65000166016 in words is "sixty-five billion, one hundred sixty-six thousand, sixteen".