25066439999 has 2 divisors, whose sum is σ = 25066440000. Its totient is φ = 25066439998.

The previous prime is 25066439989. The next prime is 25066440001. The reversal of 25066439999 is 99993466052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25066439999 - 2⁸ = 25066439743 is a prime.

Together with 25066440001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25066439989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12533219999 + 12533220000.

It is an arithmetic number, because the mean of its divisors is an integer number (12533220000).

Almost surely, 2^25066439999 is an apocalyptic number.

25066439999 is a deficient number, since it is larger than the sum of its proper divisors (1).

25066439999 is an equidigital number, since it uses as much as digits as its factorization.

25066439999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28343520, while the sum is 62.

The spelling of 25066439999 in words is "twenty-five billion, sixty-six million, four hundred thirty-nine thousand, nine hundred ninety-nine".