6620063503 has 2 divisors, whose sum is σ = 6620063504. Its totient is φ = 6620063502.

The previous prime is 6620063419. The next prime is 6620063521. The reversal of 6620063503 is 3053600266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6620063503 - 2¹³ = 6620055311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6620043503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310031751 + 3310031752.

It is an arithmetic number, because the mean of its divisors is an integer number (3310031752).

Almost surely, 2^6620063503 is an apocalyptic number.

6620063503 is a deficient number, since it is larger than the sum of its proper divisors (1).

6620063503 is an equidigital number, since it uses as much as digits as its factorization.

6620063503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 6620063503 is about 81363.7726694135. The cubic root of 6620063503 is about 1877.6762733144.

Adding to 6620063503 its reverse (3053600266), we get a palindrome (9673663769).

The spelling of 6620063503 in words is "six billion, six hundred twenty million, sixty-three thousand, five hundred three".