6656458 has 4 divisors (see below), whose sum is σ = 9984690. Its totient is φ = 3328228.

The previous prime is 6656449. The next prime is 6656459. The reversal of 6656458 is 8546566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3583449 + 3073009 = 1893^2 + 1753^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6656458.

It is not an unprimeable number, because it can be changed into a prime (6656459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1664113 + ... + 1664116.

Almost surely, 2^6656458 is an apocalyptic number.

6656458 is a deficient number, since it is larger than the sum of its proper divisors (3328232).

6656458 is a wasteful number, since it uses less digits than its factorization.

6656458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328231.

The product of its digits is 172800, while the sum is 40.

The square root of 6656458 is about 2580.0112402856. The cubic root of 6656458 is about 188.1110894671. Note that the first 3 decimals are identical.

The spelling of 6656458 in words is "six million, six hundred fifty-six thousand, four hundred fifty-eight".