2228716661 has 2 divisors, whose sum is σ = 2228716662. Its totient is φ = 2228716660.

The previous prime is 2228716577. The next prime is 2228716733. The reversal of 2228716661 is 1666178222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1338828100 + 889888561 = 36590^2 + 29831^2 .

It is a cyclic number.

It is not a de Polignac number, because 2228716661 - 2¹⁸ = 2228454517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2228716561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1114358330 + 1114358331.

It is an arithmetic number, because the mean of its divisors is an integer number (1114358331).

Almost surely, 2^2228716661 is an apocalyptic number.

It is an amenable number.

2228716661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2228716661 is an equidigital number, since it uses as much as digits as its factorization.

2228716661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 2228716661 is about 47209.2857497336. The cubic root of 2228716661 is about 1306.2258874055.

The spelling of 2228716661 in words is "two billion, two hundred twenty-eight million, seven hundred sixteen thousand, six hundred sixty-one".