6885117857 has 8 divisors (see below), whose sum is σ = 6943110720. Its totient is φ = 6827288400.

The previous prime is 6885117839. The next prime is 6885117901. The reversal of 6885117857 is 7587115886.

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 6885117857 - 2²⁴ = 6868340641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6885117557) 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, 44519 + ... + 125507.

It is an arithmetic number, because the mean of its divisors is an integer number (867888840).

Almost surely, 2^6885117857 is an apocalyptic number.

It is an amenable number.

6885117857 is a deficient number, since it is larger than the sum of its proper divisors (57992863).

6885117857 is a wasteful number, since it uses less digits than its factorization.

6885117857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81703.

The product of its digits is 3763200, while the sum is 56.

The square root of 6885117857 is about 82976.6103007347. The cubic root of 6885117857 is about 1902.4085665953.

The spelling of 6885117857 in words is "six billion, eight hundred eighty-five million, one hundred seventeen thousand, eight hundred fifty-seven".