4668636778 has 16 divisors (see below), whose sum is σ = 7543528776. Its totient is φ = 2154216960.

The previous prime is 4668636773. The next prime is 4668636779. The reversal of 4668636778 is 8776368664.

It can be written as a sum of positive squares in 4 ways, for example, as 2063248929 + 2605387849 = 45423^2 + 51043^2 .

It is not an unprimeable number, because it can be changed into a prime (4668636773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95250 + ... + 135682.

Almost surely, 2^4668636778 is an apocalyptic number.

4668636778 is a deficient number, since it is larger than the sum of its proper divisors (2874891998).

4668636778 is a wasteful number, since it uses less digits than its factorization.

4668636778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44889.

The product of its digits is 48771072, while the sum is 61.

The square root of 4668636778 is about 68327.4233232895. The cubic root of 4668636778 is about 1671.3344394055.

The spelling of 4668636778 in words is "four billion, six hundred sixty-eight million, six hundred thirty-six thousand, seven hundred seventy-eight".