2278688663 has 2 divisors, whose sum is σ = 2278688664. Its totient is φ = 2278688662.

The previous prime is 2278688647. The next prime is 2278688681. The reversal of 2278688663 is 3668868722.

2278688663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2278688663 - 2⁴ = 2278688647 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2278688599 and 2278688608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2278688963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139344331 + 1139344332.

It is an arithmetic number, because the mean of its divisors is an integer number (1139344332).

Almost surely, 2^2278688663 is an apocalyptic number.

2278688663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2278688663 is an equidigital number, since it uses as much as digits as its factorization.

2278688663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9289728, while the sum is 56.

The square root of 2278688663 is about 47735.6121045913. The cubic root of 2278688663 is about 1315.9164941100.

The spelling of 2278688663 in words is "two billion, two hundred seventy-eight million, six hundred eighty-eight thousand, six hundred sixty-three".