220202666 has 32 divisors (see below), whose sum is σ = 373403520. Its totient is φ = 96768000.

The previous prime is 220202663. The next prime is 220202681. The reversal of 220202666 is 666202022.

It is a super-2 number, since 2×220202666² = 96978428227015112, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220202663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43466 + ... + 48266.

It is an arithmetic number, because the mean of its divisors is an integer number (11668860).

Almost surely, 2^220202666 is an apocalyptic number.

220202666 is a deficient number, since it is larger than the sum of its proper divisors (153200854).

220202666 is a wasteful number, since it uses less digits than its factorization.

220202666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4910.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 220202666 is about 14839.2272709869. The cubic root of 220202666 is about 603.8663889511.

Adding to 220202666 its reverse (666202022), we get a palindrome (886404688).

The spelling of 220202666 in words is "two hundred twenty million, two hundred two thousand, six hundred sixty-six".