6620605 has 8 divisors (see below), whose sum is σ = 8063712. Its totient is φ = 5217168.

The previous prime is 6620597. The next prime is 6620611. The reversal of 6620605 is 5060266.

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 6620605 - 2³ = 6620597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6620605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9547 + ... + 10216.

It is an arithmetic number, because the mean of its divisors is an integer number (1007964).

Almost surely, 2^6620605 is an apocalyptic number.

It is an amenable number.

6620605 is a deficient number, since it is larger than the sum of its proper divisors (1443107).

6620605 is a wasteful number, since it uses less digits than its factorization.

6620605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19835.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 6620605 is about 2573.0536333314. The cubic root of 6620605 is about 187.7727467604.

It can be divided in two parts, 6620 and 605, that added together give a square (7225 = 85²).

The spelling of 6620605 in words is "six million, six hundred twenty thousand, six hundred five".