6606621 has 36 divisors (see below), whose sum is σ = 11310624. Its totient is φ = 3704400.

The previous prime is 6606581. The next prime is 6606629. The reversal of 6606621 is 1266066.

6606621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6606621 - 2⁷ = 6606493 is a prime.

6606621 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6606629) 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 35 ways as a sum of consecutive naturals, for example, 31206 + ... + 31416.

It is an arithmetic number, because the mean of its divisors is an integer number (314184).

Almost surely, 2^6606621 is an apocalyptic number.

It is an amenable number.

6606621 is a deficient number, since it is larger than the sum of its proper divisors (4704003).

6606621 is a wasteful number, since it uses less digits than its factorization.

6606621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 6606621 is about 2570.3348030947. The cubic root of 6606621 is about 187.6404494348.

It can be divided in two parts, 6606 and 621, that added together give a palindrome (7227).

The spelling of 6606621 in words is "six million, six hundred six thousand, six hundred twenty-one".