222150615066 has 56 divisors (see below), whose sum is σ = 499883222100. Its totient is φ = 74009759616.

The previous prime is 222150615061. The next prime is 222150615079. The reversal of 222150615066 is 660516051222.

222150615066 is a `hidden beast` number, since 2 + 22 + 15 + 0 + 615 + 0 + 6 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 138328205625 + 83822409441 = 371925^2 + 289521^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 222150615066.

It is not an unprimeable number, because it can be changed into a prime (222150615061) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2690160 + ... + 2771508.

Almost surely, 2^222150615066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222150615066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249941611050).

222150615066 is an abundant number, since it is smaller than the sum of its proper divisors (277732607034).

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

222150615066 is an equidigital number, since it uses as much as digits as its factorization.

222150615066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83242 (or 83227 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 222150615066 its reverse (660516051222), we get a palindrome (882666666288).

The spelling of 222150615066 in words is "two hundred twenty-two billion, one hundred fifty million, six hundred fifteen thousand, sixty-six".