6650643 has 8 divisors (see below), whose sum is σ = 8884368. Its totient is φ = 4425344.

The previous prime is 6650629. The next prime is 6650659. The reversal of 6650643 is 3460566.

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 6650643 - 2⁹ = 6650131 is a prime.

6650643 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6650643.

It is not an unprimeable number, because it can be changed into a prime (6650603) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 55 + ... + 3647.

It is an arithmetic number, because the mean of its divisors is an integer number (1110546).

Almost surely, 2^6650643 is an apocalyptic number.

6650643 is a deficient number, since it is larger than the sum of its proper divisors (2233725).

6650643 is a wasteful number, since it uses less digits than its factorization.

6650643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 6650643 is about 2578.8840609845. The cubic root of 6650643 is about 188.0562963289.

The spelling of 6650643 in words is "six million, six hundred fifty thousand, six hundred forty-three".