8220206664 has 48 divisors (see below), whose sum is σ = 23434803600. Its totient is φ = 2595854304.

The previous prime is 8220206653. The next prime is 8220206669. The reversal of 8220206664 is 4666020228.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (8220206669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3003094 + ... + 3005829.

It is an arithmetic number, because the mean of its divisors is an integer number (488225075).

Almost surely, 2^8220206664 is an apocalyptic number.

It is an amenable number.

8220206664 is an abundant number, since it is smaller than the sum of its proper divisors (15214596936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8220206664 is a wasteful number, since it uses less digits than its factorization.

8220206664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008954 (or 6008947 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 8220206664 is about 90665.3553679684. The cubic root of 8220206664 is about 2018.1847123362.

The spelling of 8220206664 in words is "eight billion, two hundred twenty million, two hundred six thousand, six hundred sixty-four".