66034221 has 8 divisors (see below), whose sum is σ = 96049824. Its totient is φ = 40020720.

The previous prime is 66034217. The next prime is 66034223. The reversal of 66034221 is 12243066.

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

It is not a de Polignac number, because 66034221 - 2² = 66034217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66034191 and 66034200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66034223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000486 + ... + 1000551.

It is an arithmetic number, because the mean of its divisors is an integer number (12006228).

Almost surely, 2^66034221 is an apocalyptic number.

It is an amenable number.

66034221 is a deficient number, since it is larger than the sum of its proper divisors (30015603).

66034221 is a wasteful number, since it uses less digits than its factorization.

66034221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001051.

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

The square root of 66034221 is about 8126.1442886525. The cubic root of 66034221 is about 404.1938360923.

Adding to 66034221 its reverse (12243066), we get a palindrome (78277287).

The spelling of 66034221 in words is "sixty-six million, thirty-four thousand, two hundred twenty-one".