6620775 has 24 divisors (see below), whose sum is σ = 12511104. Its totient is φ = 3026400.

The previous prime is 6620771. The next prime is 6620777. The reversal of 6620775 is 5770266.

6620775 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 6620775 - 2² = 6620771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620771) 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 23 ways as a sum of consecutive naturals, for example, 5781 + ... + 6830.

It is an arithmetic number, because the mean of its divisors is an integer number (521296).

Almost surely, 2^6620775 is an apocalyptic number.

6620775 is a deficient number, since it is larger than the sum of its proper divisors (5890329).

6620775 is a wasteful number, since it uses less digits than its factorization.

6620775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12631 (or 12626 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 6620775 is about 2573.0866677980. The cubic root of 6620775 is about 187.7743539194.

The spelling of 6620775 in words is "six million, six hundred twenty thousand, seven hundred seventy-five".