66222201 has 24 divisors (see below), whose sum is σ = 95243904. Its totient is φ = 40903200.

The previous prime is 66222199. The next prime is 66222209. The reversal of 66222201 is 10222266.

It is not a de Polignac number, because 66222201 - 2¹ = 66222199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66222209) 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, 50251 + ... + 51551.

It is an arithmetic number, because the mean of its divisors is an integer number (3968496).

Almost surely, 2^66222201 is an apocalyptic number.

It is an amenable number.

66222201 is a deficient number, since it is larger than the sum of its proper divisors (29021703).

66222201 is a wasteful number, since it uses less digits than its factorization.

66222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389 (or 1370 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 66222201 is about 8137.7024398782. The cubic root of 66222201 is about 404.5770130373.

Adding to 66222201 its reverse (10222266), we get a palindrome (76444467).

The spelling of 66222201 in words is "sixty-six million, two hundred twenty-two thousand, two hundred one".