66132222 has 64 divisors (see below), whose sum is σ = 150183936. Its totient is φ = 19261440.

The previous prime is 66132203. The next prime is 66132239. The reversal of 66132222 is 22223166.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 66132192 and 66132201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 342558 + ... + 342750.

It is an arithmetic number, because the mean of its divisors is an integer number (2346624).

Almost surely, 2^66132222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66132222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75091968).

66132222 is an abundant number, since it is smaller than the sum of its proper divisors (84051714).

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

66132222 is a wasteful number, since it uses less digits than its factorization.

66132222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425.

The product of its digits is 1728, while the sum is 24.

The square root of 66132222 is about 8132.1720345797. The cubic root of 66132222 is about 404.3936911573.

Adding to 66132222 its reverse (22223166), we get a palindrome (88355388).

The spelling of 66132222 in words is "sixty-six million, one hundred thirty-two thousand, two hundred twenty-two".