6780668264 has 8 divisors (see below), whose sum is σ = 12713753010. Its totient is φ = 3390334128.

The previous prime is 6780668243. The next prime is 6780668269. The reversal of 6780668264 is 4628660876.

It can be written as a sum of positive squares in only one way, i.e., 6619124164 + 161544100 = 81358^2 + 12710^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (6780668269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423791759 + ... + 423791774.

Almost surely, 2^6780668264 is an apocalyptic number.

It is an amenable number.

6780668264 is a deficient number, since it is larger than the sum of its proper divisors (5933084746).

6780668264 is a wasteful number, since it uses less digits than its factorization.

6780668264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847583539 (or 847583535 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 53.

The square root of 6780668264 is about 82344.8132185628. The cubic root of 6780668264 is about 1892.7394429659.

The spelling of 6780668264 in words is "six billion, seven hundred eighty million, six hundred sixty-eight thousand, two hundred sixty-four".