7663896778 has 16 divisors (see below), whose sum is σ = 11716254720. Its totient is φ = 3758521936.

The previous prime is 7663896767. The next prime is 7663896811. The reversal of 7663896778 is 8776983667.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428703 + ... + 446221.

It is an arithmetic number, because the mean of its divisors is an integer number (732265920).

Almost surely, 2^7663896778 is an apocalyptic number.

7663896778 is a deficient number, since it is larger than the sum of its proper divisors (4052357942).

7663896778 is a wasteful number, since it uses less digits than its factorization.

7663896778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21701.

The product of its digits is 128024064, while the sum is 67.

The square root of 7663896778 is about 87543.6849692769. The cubic root of 7663896778 is about 1971.5897375903.

The spelling of 7663896778 in words is "seven billion, six hundred sixty-three million, eight hundred ninety-six thousand, seven hundred seventy-eight".