7663709840 has 20 divisors (see below), whose sum is σ = 17818125564. Its totient is φ = 3065483904.

The previous prime is 7663709821. The next prime is 7663709861. The reversal of 7663709840 is 489073667.

It can be written as a sum of positive squares in 2 ways, for example, as 4475074816 + 3188635024 = 66896^2 + 56468^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 47898107 + ... + 47898266.

Almost surely, 2^7663709840 is an apocalyptic number.

It is an amenable number.

7663709840 is an abundant number, since it is smaller than the sum of its proper divisors (10154415724).

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

7663709840 is a wasteful number, since it uses less digits than its factorization.

7663709840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95796386 (or 95796380 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 50.

The square root of 7663709840 is about 87542.6172786718. The cubic root of 7663709840 is about 1971.5737071013.

The spelling of 7663709840 in words is "seven billion, six hundred sixty-three million, seven hundred nine thousand, eight hundred forty".