66031222 has 8 divisors (see below), whose sum is σ = 99086400. Its totient is φ = 33002424.

The previous prime is 66031169. The next prime is 66031223. The reversal of 66031222 is 22213066.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 66031193 and 66031202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66031223) 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, 1804 + ... + 11632.

It is an arithmetic number, because the mean of its divisors is an integer number (12385800).

Almost surely, 2^66031222 is an apocalyptic number.

66031222 is a deficient number, since it is larger than the sum of its proper divisors (33055178).

66031222 is a wasteful number, since it uses less digits than its factorization.

66031222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13190.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 66031222 is about 8125.9597586993. The cubic root of 66031222 is about 404.1877170647.

Adding to 66031222 its reverse (22213066), we get a palindrome (88244288).

The spelling of 66031222 in words is "sixty-six million, thirty-one thousand, two hundred twenty-two".