66222266 has 16 divisors (see below), whose sum is σ = 109440288. Its totient is φ = 29802000.

The previous prime is 66222253. The next prime is 66222269.

66222266 is nontrivially palindromic in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (66222269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12680 + ... + 17123.

It is an arithmetic number, because the mean of its divisors is an integer number (6840018).

Almost surely, 2^66222266 is an apocalyptic number.

66222266 is a deficient number, since it is larger than the sum of its proper divisors (43218022).

66222266 is a wasteful number, since it uses less digits than its factorization.

66222266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29917.

The product of its digits is 20736, while the sum is 32.

The square root of 66222266 is about 8137.7064336335. The cubic root of 66222266 is about 404.5771454073.

It can be divided in two parts, 6622 and 2266, that added together give a palindrome (8888).

The spelling of 66222266 in words is "sixty-six million, two hundred twenty-two thousand, two hundred sixty-six".