2217364661 has 4 divisors (see below), whose sum is σ = 2219479500. Its totient is φ = 2215249824.

The previous prime is 2217364571. The next prime is 2217364687. The reversal of 2217364661 is 1664637122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1664637122 = 2 ⋅832318561.

It can be written as a sum of positive squares in 2 ways, for example, as 888397636 + 1328967025 = 29806^2 + 36455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2217364661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217364691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055846 + ... + 1057943.

It is an arithmetic number, because the mean of its divisors is an integer number (554869875).

Almost surely, 2^2217364661 is an apocalyptic number.

It is an amenable number.

2217364661 is a deficient number, since it is larger than the sum of its proper divisors (2114839).

2217364661 is a wasteful number, since it uses less digits than its factorization.

2217364661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114838.

The product of its digits is 72576, while the sum is 38.

The square root of 2217364661 is about 47088.9016754479. The cubic root of 2217364661 is about 1304.0043512736.

The spelling of 2217364661 in words is "two billion, two hundred seventeen million, three hundred sixty-four thousand, six hundred sixty-one".