6808696654778 has 4 divisors (see below), whose sum is σ = 10213044982170. Its totient is φ = 3404348327388.

The previous prime is 6808696654733. The next prime is 6808696654789. The reversal of 6808696654778 is 8774566968086.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4928608682209 + 1880087972569 = 2220047^2 + 1371163^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1702174163693 + ... + 1702174163696.

Almost surely, 2^{6808696654778} is an apocalyptic number.

6808696654778 is a deficient number, since it is larger than the sum of its proper divisors (3404348327392).

6808696654778 is a wasteful number, since it uses less digits than its factorization.

6808696654778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404348327391.

The product of its (nonzero) digits is 5852528640, while the sum is 80.

The spelling of 6808696654778 in words is "six trillion, eight hundred eight billion, six hundred ninety-six million, six hundred fifty-four thousand, seven hundred seventy-eight".