8220167640 has 48 divisors (see below), whose sum is σ = 26715546000. Its totient is φ = 2192044608.

The previous prime is 8220167621. The next prime is 8220167647. The reversal of 8220167640 is 467610228.

8220167640 is a `hidden beast` number, since 8 + 2 + 2 + 0 + 1 + 6 + 7 + 640 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 8220167595 and 8220167604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8220167647) 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, 11416540 + ... + 11417259.

It is an arithmetic number, because the mean of its divisors is an integer number (556573875).

Almost surely, 2^8220167640 is an apocalyptic number.

It is an amenable number.

8220167640 is an abundant number, since it is smaller than the sum of its proper divisors (18495378360).

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

8220167640 is a wasteful number, since it uses less digits than its factorization.

8220167640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22833816 (or 22833809 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 8220167640 is about 90665.1401587181. The cubic root of 8220167640 is about 2018.1815186710.

Adding to 8220167640 its reverse (467610228), we get a palindrome (8687777868).

The spelling of 8220167640 in words is "eight billion, two hundred twenty million, one hundred sixty-seven thousand, six hundred forty".