7665801216 has 72 divisors (see below), whose sum is σ = 20455458660. Its totient is φ = 2552979456.

The previous prime is 7665801203. The next prime is 7665801251. The reversal of 7665801216 is 6121085667.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6862290 + ... + 6863406.

Almost surely, 2^7665801216 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 7665801216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10227729330).

7665801216 is an abundant number, since it is smaller than the sum of its proper divisors (12789657444).

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

7665801216 is an frugal number, since it uses more digits than its factorization.

7665801216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259 (or 1122 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 7665801216 is about 87554.5613660419. The cubic root of 7665801216 is about 1971.7530339548.

The spelling of 7665801216 in words is "seven billion, six hundred sixty-five million, eight hundred one thousand, two hundred sixteen".