6878449657 has 8 divisors (see below), whose sum is σ = 7096947840. Its totient is φ = 6663237360.

The previous prime is 6878449649. The next prime is 6878449661. The reversal of 6878449657 is 7569448786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6878449657 - 2³ = 6878449649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6878449637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817219 + ... + 825592.

It is an arithmetic number, because the mean of its divisors is an integer number (887118480).

Almost surely, 2^6878449657 is an apocalyptic number.

It is an amenable number.

6878449657 is a deficient number, since it is larger than the sum of its proper divisors (218498183).

6878449657 is a wasteful number, since it uses less digits than its factorization.

6878449657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642943.

The product of its digits is 81285120, while the sum is 64.

The square root of 6878449657 is about 82936.4193644746. The cubic root of 6878449657 is about 1901.7942106953.

The spelling of 6878449657 in words is "six billion, eight hundred seventy-eight million, four hundred forty-nine thousand, six hundred fifty-seven".