65116665504 has 192 divisors, whose sum is σ = 207545950080. Its totient is φ = 19698370560.

The previous prime is 65116665491. The next prime is 65116665517. The reversal of 65116665504 is 40556661156.

It is an interprime number because it is at equal distance from previous prime (65116665491) and next prime (65116665517).

It is a self number, because there is not a number n which added to its sum of digits gives 65116665504.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5820364 + ... + 5831540.

It is an arithmetic number, because the mean of its divisors is an integer number (1080968490).

Almost surely, 2^65116665504 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 65116665504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103772975040).

65116665504 is an abundant number, since it is smaller than the sum of its proper divisors (142429284576).

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

65116665504 is a wasteful number, since it uses less digits than its factorization.

65116665504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11820 (or 11806 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 65116665504 in words is "sixty-five billion, one hundred sixteen million, six hundred sixty-five thousand, five hundred four".