7766065816 has 16 divisors (see below), whose sum is σ = 14562401040. Its totient is φ = 3882758880.

The previous prime is 7766065793. The next prime is 7766065823. The reversal of 7766065816 is 6185606677.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135925 + ... + 184411.

It is an arithmetic number, because the mean of its divisors is an integer number (910150065).

Almost surely, 2^7766065816 is an apocalyptic number.

It is an amenable number.

7766065816 is a deficient number, since it is larger than the sum of its proper divisors (6796335224).

7766065816 is a wasteful number, since it uses less digits than its factorization.

7766065816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68514 (or 68510 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 52.

The square root of 7766065816 is about 88125.2847711711. The cubic root of 7766065816 is about 1980.3123181789.

The spelling of 7766065816 in words is "seven billion, seven hundred sixty-six million, sixty-five thousand, eight hundred sixteen".