6657885 has 48 divisors (see below), whose sum is σ = 13104000. Its totient is φ = 3100032.

The previous prime is 6657881. The next prime is 6657887. The reversal of 6657885 is 5887566.

It is not a de Polignac number, because 6657885 - 2² = 6657881 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6657885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6657881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10816 + ... + 11414.

It is an arithmetic number, because the mean of its divisors is an integer number (273000).

Almost surely, 2^6657885 is an apocalyptic number.

6657885 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6657885 is a deficient number, since it is larger than the sum of its proper divisors (6446115).

6657885 is a wasteful number, since it uses less digits than its factorization.

6657885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 639 counting only the distinct ones).

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

The square root of 6657885 is about 2580.2877746484. The cubic root of 6657885 is about 188.1245308171.

The spelling of 6657885 in words is "six million, six hundred fifty-seven thousand, eight hundred eighty-five".