6620253 has 8 divisors (see below), whose sum is σ = 8951616. Its totient is φ = 4351200.

The previous prime is 6620231. The next prime is 6620261. The reversal of 6620253 is 3520266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6620253 - 2¹⁰ = 6619229 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15328 + ... + 15753.

It is an arithmetic number, because the mean of its divisors is an integer number (1118952).

Almost surely, 2^6620253 is an apocalyptic number.

It is an amenable number.

6620253 is a deficient number, since it is larger than the sum of its proper divisors (2331363).

6620253 is a wasteful number, since it uses less digits than its factorization.

6620253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31155.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 6620253 is about 2572.9852312052. The cubic root of 6620253 is about 187.7694189085.

The spelling of 6620253 in words is "six million, six hundred twenty thousand, two hundred fifty-three".