6878440691 has 8 divisors (see below), whose sum is σ = 7040047344. Its totient is φ = 6716908800.

The previous prime is 6878440687. The next prime is 6878440717. The reversal of 6878440691 is 1960448786.

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 6878440691 - 2² = 6878440687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6878440991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196091 + ... + 228491.

It is an arithmetic number, because the mean of its divisors is an integer number (880005918).

Almost surely, 2^6878440691 is an apocalyptic number.

6878440691 is a deficient number, since it is larger than the sum of its proper divisors (161606653).

6878440691 is a wasteful number, since it uses less digits than its factorization.

6878440691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37381.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The square root of 6878440691 is about 82936.3653110021. The cubic root of 6878440691 is about 1901.7933843708.

The spelling of 6878440691 in words is "six billion, eight hundred seventy-eight million, four hundred forty thousand, six hundred ninety-one".