6620818911 has 16 divisors (see below), whose sum is σ = 10090036224. Its totient is φ = 3782886624.

The previous prime is 6620818909. The next prime is 6620818913. The reversal of 6620818911 is 1198180266.

It is an interprime number because it is at equal distance from previous prime (6620818909) and next prime (6620818913).

It is not a de Polignac number, because 6620818911 - 2¹ = 6620818909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620818913) 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 15 ways as a sum of consecutive naturals, for example, 282021 + ... + 304593.

It is an arithmetic number, because the mean of its divisors is an integer number (630627264).

Almost surely, 2^6620818911 is an apocalyptic number.

6620818911 is a deficient number, since it is larger than the sum of its proper divisors (3469217313).

6620818911 is a wasteful number, since it uses less digits than its factorization.

6620818911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36550.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 6620818911 is about 81368.4147012832. The cubic root of 6620818911 is about 1877.7476904405.

The spelling of 6620818911 in words is "six billion, six hundred twenty million, eight hundred eighteen thousand, nine hundred eleven".