2886216661 has 2 divisors, whose sum is σ = 2886216662. Its totient is φ = 2886216660.

The previous prime is 2886216649. The next prime is 2886216691. The reversal of 2886216661 is 1666126882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2320252561 + 565964100 = 48169^2 + 23790^2 .

It is a cyclic number.

It is not a de Polignac number, because 2886216661 - 2⁹ = 2886216149 is a prime.

It is a super-2 number, since 2×2886216661² = 16660493228467977842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2886216611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1443108330 + 1443108331.

It is an arithmetic number, because the mean of its divisors is an integer number (1443108331).

Almost surely, 2^2886216661 is an apocalyptic number.

It is an amenable number.

2886216661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2886216661 is an equidigital number, since it uses as much as digits as its factorization.

2886216661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 46.

The square root of 2886216661 is about 53723.5205566426. The cubic root of 2886216661 is about 1423.7802898003.

The spelling of 2886216661 in words is "two billion, eight hundred eighty-six million, two hundred sixteen thousand, six hundred sixty-one".