6620303 has 4 divisors (see below), whose sum is σ = 6968760. Its totient is φ = 6271848.

The previous prime is 6620291. The next prime is 6620309. The reversal of 6620303 is 3030266.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6620303 - 2⁴ = 6620287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174200 + ... + 174237.

It is an arithmetic number, because the mean of its divisors is an integer number (1742190).

Almost surely, 2^6620303 is an apocalyptic number.

6620303 is a deficient number, since it is larger than the sum of its proper divisors (348457).

6620303 is a wasteful number, since it uses less digits than its factorization.

6620303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348456.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 6620303 is about 2572.9949475271. The cubic root of 6620303 is about 187.7698916220.

Adding to 6620303 its reverse (3030266), we get a palindrome (9650569).

The spelling of 6620303 in words is "six million, six hundred twenty thousand, three hundred three".