66011022 has 96 divisors (see below), whose sum is σ = 180520704. Its totient is φ = 16934400.

The previous prime is 66011021. The next prime is 66011069. The reversal of 66011022 is 22011066.

It is a happy number.

66011022 is a `hidden beast` number, since 660 + 1 + 1 + 0 + 2 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 66010986 and 66011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66011021) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 134197 + ... + 134687.

It is an arithmetic number, because the mean of its divisors is an integer number (1880424).

Almost surely, 2^66011022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66011022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90260352).

66011022 is an abundant number, since it is smaller than the sum of its proper divisors (114509682).

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

66011022 is a wasteful number, since it uses less digits than its factorization.

66011022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 66011022 is about 8124.7167335237. The cubic root of 66011022 is about 404.1464970462.

Adding to 66011022 its reverse (22011066), we get a palindrome (88022088).

The spelling of 66011022 in words is "sixty-six million, eleven thousand, twenty-two".