7768867408 has 20 divisors (see below), whose sum is σ = 15054744148. Its totient is φ = 3883772160.

The previous prime is 7768867373. The next prime is 7768867409. The reversal of 7768867408 is 8047688677.

It can be written as a sum of positive squares in 2 ways, for example, as 1822606864 + 5946260544 = 42692^2 + 77112^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7768867409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63610 + ... + 139942.

Almost surely, 2^7768867408 is an apocalyptic number.

It is an amenable number.

7768867408 is a deficient number, since it is larger than the sum of its proper divisors (7285876740).

7768867408 is a wasteful number, since it uses less digits than its factorization.

7768867408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82702 (or 82696 counting only the distinct ones).

The product of its (nonzero) digits is 25288704, while the sum is 61.

The square root of 7768867408 is about 88141.1788439433. The cubic root of 7768867408 is about 1980.5504207252.

The spelling of 7768867408 in words is "seven billion, seven hundred sixty-eight million, eight hundred sixty-seven thousand, four hundred eight".