2668821523 has 2 divisors, whose sum is σ = 2668821524. Its totient is φ = 2668821522.

The previous prime is 2668821479. The next prime is 2668821557. The reversal of 2668821523 is 3251288662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2668821523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2668821523.

It is not a weakly prime, because it can be changed into another prime (2668821593) 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 as a sum of consecutive naturals, namely, 1334410761 + 1334410762.

It is an arithmetic number, because the mean of its divisors is an integer number (1334410762).

Almost surely, 2^2668821523 is an apocalyptic number.

2668821523 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668821523 is an equidigital number, since it uses as much as digits as its factorization.

2668821523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 43.

The square root of 2668821523 is about 51660.6380429046. The cubic root of 2668821523 is about 1387.0959716186.

The spelling of 2668821523 in words is "two billion, six hundred sixty-eight million, eight hundred twenty-one thousand, five hundred twenty-three".