6620023 has 4 divisors (see below), whose sum is σ = 6644200. Its totient is φ = 6595848.

The previous prime is 6620017. The next prime is 6620027. The reversal of 6620023 is 3200266.

6620023 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6620023 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 (6620027) 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, 11673 + ... + 12226.

It is an arithmetic number, because the mean of its divisors is an integer number (1661050).

Almost surely, 2^6620023 is an apocalyptic number.

6620023 is a deficient number, since it is larger than the sum of its proper divisors (24177).

6620023 is a wasteful number, since it uses less digits than its factorization.

6620023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24176.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 6620023 is about 2572.9405356518. The cubic root of 6620023 is about 187.7672443962.

Adding to 6620023 its reverse (3200266), we get a palindrome (9820289).

The spelling of 6620023 in words is "six million, six hundred twenty thousand, twenty-three".