66654222 has 8 divisors (see below), whose sum is σ = 133308456. Its totient is φ = 22218072.

The previous prime is 66654221. The next prime is 66654239. The reversal of 66654222 is 22245666.

It is a sphenic number, since it is the product of 3 distinct primes.

66654222 is an admirable number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66654221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5554513 + ... + 5554524.

It is an arithmetic number, because the mean of its divisors is an integer number (16663557).

Almost surely, 2^66654222 is an apocalyptic number.

66654222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66654222 is a wasteful number, since it uses less digits than its factorization.

66654222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11109042.

The product of its digits is 34560, while the sum is 33.

The square root of 66654222 is about 8164.2036966259. The cubic root of 66654222 is about 405.4549011427.

Adding to 66654222 its reverse (22245666), we get a palindrome (88899888).

The spelling of 66654222 in words is "sixty-six million, six hundred fifty-four thousand, two hundred twenty-two".