8218653660 has 288 divisors, whose sum is σ = 30503596032. Its totient is φ = 1817717760.

The previous prime is 8218653649. The next prime is 8218653727. The reversal of 8218653660 is 663568128.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1050724 + ... + 1058516.

It is an arithmetic number, because the mean of its divisors is an integer number (105915264).

Almost surely, 2^8218653660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8218653660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15251798016).

8218653660 is an abundant number, since it is smaller than the sum of its proper divisors (22284942372).

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

8218653660 is a wasteful number, since it uses less digits than its factorization.

8218653660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7855 (or 7841 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 8218653660 is about 90656.7904792575. The cubic root of 8218653660 is about 2018.0576090301.

The spelling of 8218653660 in words is "eight billion, two hundred eighteen million, six hundred fifty-three thousand, six hundred sixty".