6702108078649 has 9 divisors (see below), whose sum is σ = 6739812092559. Its totient is φ = 6664613865480.

The previous prime is 6702108078647. The next prime is 6702108078667. The reversal of 6702108078649 is 9468708012076.

The square root of 6702108078649 is 2588843.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 73851867049 + 6628256211600 = 271757^2 + 2574540^2 .

It is not a de Polignac number, because 6702108078649 - 2¹ = 6702108078647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6702108078593 and 6702108078602.

It is not an unprimeable number, because it can be changed into a prime (6702108078643) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 468573432 + ... + 468587734.

Almost surely, 2^{6702108078649} is an apocalyptic number.

6702108078649 is the 2588843-rd square number.

6702108078649 is the 1294422-nd centered octagonal number.

It is an amenable number.

6702108078649 is a deficient number, since it is larger than the sum of its proper divisors (37704013910).

6702108078649 is an frugal number, since it uses more digits than its factorization.

6702108078649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28968 (or 14484 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 6702108078649 in words is "six trillion, seven hundred two billion, one hundred eight million, seventy-eight thousand, six hundred forty-nine".