6978860872 has 16 divisors (see below), whose sum is σ = 13086848700. Its totient is φ = 3489034560.

The previous prime is 6978860849. The next prime is 6978860891. The reversal of 6978860872 is 2780688796.

It can be written as a sum of positive squares in 2 ways, for example, as 6488946916 + 489913956 = 80554^2 + 22134^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6978860872.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33654 + ... + 122842.

Almost surely, 2^6978860872 is an apocalyptic number.

It is an amenable number.

6978860872 is a deficient number, since it is larger than the sum of its proper divisors (6107987828).

6978860872 is a wasteful number, since it uses less digits than its factorization.

6978860872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98976 (or 98972 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 61.

The square root of 6978860872 is about 83539.5766807565. The cubic root of 6978860872 is about 1911.0036365267.

The spelling of 6978860872 in words is "six billion, nine hundred seventy-eight million, eight hundred sixty thousand, eight hundred seventy-two".