6620245 has 8 divisors (see below), whose sum is σ = 7994016. Its totient is φ = 5263056.

The previous prime is 6620231. The next prime is 6620261. The reversal of 6620245 is 5420266.

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 6620245 - 2¹¹ = 6618197 is a prime.

It is a super-3 number, since 3×6620245³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

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, 3247 + ... + 4876.

It is an arithmetic number, because the mean of its divisors is an integer number (999252).

Almost surely, 2^6620245 is an apocalyptic number.

It is an amenable number.

6620245 is a deficient number, since it is larger than the sum of its proper divisors (1373771).

6620245 is a wasteful number, since it uses less digits than its factorization.

6620245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8291.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 6620245 is about 2572.9836765903. The cubic root of 6620245 is about 187.7693432742.

The spelling of 6620245 in words is "six million, six hundred twenty thousand, two hundred forty-five".