66100222 has 16 divisors (see below), whose sum is σ = 104509440. Its totient is φ = 31306912.

The previous prime is 66100207. The next prime is 66100261. The reversal of 66100222 is 22200166.

It is a self number, because there is not a number n which added to its sum of digits gives 66100222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7678 + ... + 13825.

It is an arithmetic number, because the mean of its divisors is an integer number (6531840).

Almost surely, 2^66100222 is an apocalyptic number.

66100222 is a deficient number, since it is larger than the sum of its proper divisors (38409218).

66100222 is a wasteful number, since it uses less digits than its factorization.

66100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21587.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 66100222 is about 8130.2043024760. The cubic root of 66100222 is about 404.3284547490.

Adding to 66100222 its reverse (22200166), we get a palindrome (88300388).

The spelling of 66100222 in words is "sixty-six million, one hundred thousand, two hundred twenty-two".