6868557 has 20 divisors (see below), whose sum is σ = 10802880. Its totient is φ = 4337064.

The previous prime is 6868553. The next prime is 6868571. The reversal of 6868557 is 7558686.

6868557 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6868557 - 2² = 6868553 is a prime.

6868557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6868553) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 693 + ... + 3770.

It is an arithmetic number, because the mean of its divisors is an integer number (540144).

Almost surely, 2^6868557 is an apocalyptic number.

It is an amenable number.

6868557 is a deficient number, since it is larger than the sum of its proper divisors (3934323).

6868557 is a wasteful number, since it uses less digits than its factorization.

6868557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4494 (or 4485 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 6868557 is about 2620.7932005406. The cubic root of 6868557 is about 190.0882046600.

The spelling of 6868557 in words is "six million, eight hundred sixty-eight thousand, five hundred fifty-seven".