66014221 has 24 divisors (see below), whose sum is σ = 85392384. Its totient is φ = 50531040.

The previous prime is 66014197. The next prime is 66014231. The reversal of 66014221 is 12241066.

It is not a de Polignac number, because 66014221 - 2¹⁷ = 65883149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66014192 and 66014201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66014231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18076 + ... + 21418.

It is an arithmetic number, because the mean of its divisors is an integer number (3558016).

Almost surely, 2^66014221 is an apocalyptic number.

It is an amenable number.

66014221 is a deficient number, since it is larger than the sum of its proper divisors (19378163).

66014221 is a wasteful number, since it uses less digits than its factorization.

66014221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401 (or 3394 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 66014221 is about 8124.9135995406. The cubic root of 66014221 is about 404.1530254699.

Adding to 66014221 its reverse (12241066), we get a palindrome (78255287).

The spelling of 66014221 in words is "sixty-six million, fourteen thousand, two hundred twenty-one".