6656601 has 16 divisors (see below), whose sum is σ = 10352000. Its totient is φ = 3803184.

The previous prime is 6656597. The next prime is 6656603. The reversal of 6656601 is 1066566.

It is not a de Polignac number, because 6656601 - 2² = 6656597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6656603) 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 in 15 ways as a sum of consecutive naturals, for example, 2206 + ... + 4263.

It is an arithmetic number, because the mean of its divisors is an integer number (647000).

Almost surely, 2^6656601 is an apocalyptic number.

It is an amenable number.

6656601 is a deficient number, since it is larger than the sum of its proper divisors (3695399).

6656601 is an equidigital number, since it uses as much as digits as its factorization.

6656601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6493 (or 6479 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 6656601 is about 2580.0389531943. The cubic root of 6656601 is about 188.1124365145.

The spelling of 6656601 in words is "six million, six hundred fifty-six thousand, six hundred one".