220166245 has 8 divisors (see below), whose sum is σ = 284522616. Its totient is φ = 162584256.

The previous prime is 220166239. The next prime is 220166251. The reversal of 220166245 is 542661022.

It is a Cunningham number, because it is equal to 14838²+1.

It is an interprime number because it is at equal distance from previous prime (220166239) and next prime (220166251).

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 220166244 = 1^2 + 14838^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 220166245 - 2⁵ = 220166213 is a prime.

It is a Duffinian number.

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, 1693522 + ... + 1693651.

It is an arithmetic number, because the mean of its divisors is an integer number (35565327).

Almost surely, 2^220166245 is an apocalyptic number.

It is an amenable number.

220166245 is a deficient number, since it is larger than the sum of its proper divisors (64356371).

220166245 is a wasteful number, since it uses less digits than its factorization.

220166245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387191.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 220166245 is about 14838.0000336973. Note that the first 4 decimals coincide. The cubic root of 220166245 is about 603.8330944247.

The spelling of 220166245 in words is "two hundred twenty million, one hundred sixty-six thousand, two hundred forty-five".