220316661 has 12 divisors (see below), whose sum is σ = 318373120. Its totient is φ = 146814120.

The previous prime is 220316633. The next prime is 220316669. The reversal of 220316661 is 166613022.

It is not a de Polignac number, because 220316661 - 2¹⁰ = 220315637 is a prime.

It is a super-2 number, since 2×220316661² = 97078862228377842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220316669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26910 + ... + 34128.

Almost surely, 2^220316661 is an apocalyptic number.

It is an amenable number.

220316661 is a deficient number, since it is larger than the sum of its proper divisors (98056459).

220316661 is a wasteful number, since it uses less digits than its factorization.

220316661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10616 (or 10613 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 220316661 is about 14843.0677759013. The cubic root of 220316661 is about 603.9705746012.

Adding to 220316661 its reverse (166613022), we get a palindrome (386929683).

The spelling of 220316661 in words is "two hundred twenty million, three hundred sixteen thousand, six hundred sixty-one".