6656651 has 8 divisors (see below), whose sum is σ = 6853584. Its totient is φ = 6462720.

The previous prime is 6656647. The next prime is 6656659. The reversal of 6656651 is 1566566.

6656651 = 153² + 154² + ... + 286².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6656651 - 2² = 6656647 is a prime.

It is a super-2 number, since 2×6656651² = 88622005071602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6656659) 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 7 ways as a sum of consecutive naturals, for example, 4211 + ... + 5571.

It is an arithmetic number, because the mean of its divisors is an integer number (856698).

Almost surely, 2^6656651 is an apocalyptic number.

6656651 is a deficient number, since it is larger than the sum of its proper divisors (196933).

6656651 is a wasteful number, since it uses less digits than its factorization.

6656651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501.

The product of its digits is 32400, while the sum is 35.

The square root of 6656651 is about 2580.0486429523. The cubic root of 6656651 is about 188.1129075056.

The spelling of 6656651 in words is "six million, six hundred fifty-six thousand, six hundred fifty-one".