224716661 has 8 divisors (see below), whose sum is σ = 246569400. Its totient is φ = 203516352.

The previous prime is 224716649. The next prime is 224716673. The reversal of 224716661 is 166617422.

It is an interprime number because it is at equal distance from previous prime (224716649) and next prime (224716673).

It can be written as a sum of positive squares in 4 ways, for example, as 12460900 + 212255761 = 3530^2 + 14569^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-224716661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224716691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162386 + ... + 163763.

It is an arithmetic number, because the mean of its divisors is an integer number (30821175).

Almost surely, 2^224716661 is an apocalyptic number.

It is an amenable number.

224716661 is a deficient number, since it is larger than the sum of its proper divisors (21852739).

224716661 is a wasteful number, since it uses less digits than its factorization.

224716661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326215.

The product of its digits is 24192, while the sum is 35.

The square root of 224716661 is about 14990.5523914231. The cubic root of 224716661 is about 607.9647849021.

The spelling of 224716661 in words is "two hundred twenty-four million, seven hundred sixteen thousand, six hundred sixty-one".