6420218075 has 18 divisors (see below), whose sum is σ = 8061569964. Its totient is φ = 5071408080.

The previous prime is 6420218053. The next prime is 6420218149. The reversal of 6420218075 is 5708120246.

It is not a de Polignac number, because 6420218075 - 2²⁰ = 6419169499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 3649046 + ... + 3650804.

It is an arithmetic number, because the mean of its divisors is an integer number (447864998).

Almost surely, 2^6420218075 is an apocalyptic number.

6420218075 is a deficient number, since it is larger than the sum of its proper divisors (1641351889).

6420218075 is an frugal number, since it uses more digits than its factorization.

6420218075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3611 (or 1847 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 6420218075 is about 80126.2633285741. The cubic root of 6420218075 is about 1858.5885614489.

The spelling of 6420218075 in words is "six billion, four hundred twenty million, two hundred eighteen thousand, seventy-five".