6656635 has 4 divisors (see below), whose sum is σ = 7987968. Its totient is φ = 5325304.

The previous prime is 6656627. The next prime is 6656647. The reversal of 6656635 is 5366566.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6656635 - 2³ = 6656627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6656594 and 6656603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665659 + ... + 665668.

It is an arithmetic number, because the mean of its divisors is an integer number (1996992).

Almost surely, 2^6656635 is an apocalyptic number.

6656635 is a deficient number, since it is larger than the sum of its proper divisors (1331333).

6656635 is a wasteful number, since it uses less digits than its factorization.

6656635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331332.

The product of its digits is 97200, while the sum is 37.

The square root of 6656635 is about 2580.0455422337. The cubic root of 6656635 is about 188.1127567887.

The spelling of 6656635 in words is "six million, six hundred fifty-six thousand, six hundred thirty-five".