6620503357 has 6 divisors (see below), whose sum is σ = 7130088798. Its totient is φ = 6110963064.

The previous prime is 6620503349. The next prime is 6620503363. The reversal of 6620503357 is 7533050266.

It is a happy number.

6620503357 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 4583425401 + 2037077956 = 67701^2 + 45134^2 .

It is not a de Polignac number, because 6620503357 - 2³ = 6620503349 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 (6620503397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 282088 + ... + 304654.

It is an arithmetic number, because the mean of its divisors is an integer number (1188348133).

Almost surely, 2^6620503357 is an apocalyptic number.

It is an amenable number.

6620503357 is a deficient number, since it is larger than the sum of its proper divisors (509585441).

6620503357 is an frugal number, since it uses more digits than its factorization.

6620503357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45147 (or 22580 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 37.

The square root of 6620503357 is about 81366.4756333958. The cubic root of 6620503357 is about 1877.7178582694.

The spelling of 6620503357 in words is "six billion, six hundred twenty million, five hundred three thousand, three hundred fifty-seven".