6656538 has 16 divisors (see below), whose sum is σ = 15215040. Its totient is φ = 1901856.

The previous prime is 6656527. The next prime is 6656539. The reversal of 6656538 is 8356566.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6656496 and 6656505.

It is not an unprimeable number, because it can be changed into a prime (6656539) 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, 79203 + ... + 79286.

It is an arithmetic number, because the mean of its divisors is an integer number (950940).

Almost surely, 2^6656538 is an apocalyptic number.

6656538 is an abundant number, since it is smaller than the sum of its proper divisors (8558502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6656538 is a wasteful number, since it uses less digits than its factorization.

6656538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158501.

The product of its digits is 129600, while the sum is 39.

The square root of 6656538 is about 2580.0267440474. The cubic root of 6656538 is about 188.1118430625. Note that the first 3 decimals are identical.

The spelling of 6656538 in words is "six million, six hundred fifty-six thousand, five hundred thirty-eight".