9966527489 has 2 divisors, whose sum is σ = 9966527490. Its totient is φ = 9966527488.

The previous prime is 9966527479. The next prime is 9966527503. The reversal of 9966527489 is 9847256699.

9966527489 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9220800625 + 745726864 = 96025^2 + 27308^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9966527489 is a prime.

It is not a weakly prime, because it can be changed into another prime (9966527419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4983263744 + 4983263745.

It is an arithmetic number, because the mean of its divisors is an integer number (4983263745).

Almost surely, 2^9966527489 is an apocalyptic number.

It is an amenable number.

9966527489 is a deficient number, since it is larger than the sum of its proper divisors (1).

9966527489 is an equidigital number, since it uses as much as digits as its factorization.

9966527489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 65.

The square root of 9966527489 is about 99832.4971589913. The cubic root of 9966527489 is about 2152.0281916845.

The spelling of 9966527489 in words is "nine billion, nine hundred sixty-six million, five hundred twenty-seven thousand, four hundred eighty-nine".