9966251 has 2 divisors, whose sum is σ = 9966252. Its totient is φ = 9966250.

The previous prime is 9966223. The next prime is 9966259. The reversal of 9966251 is 1526699.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9966251 - 2¹⁰ = 9965227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9966259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4983125 + 4983126.

It is an arithmetic number, because the mean of its divisors is an integer number (4983126).

Almost surely, 2^9966251 is an apocalyptic number.

9966251 is a deficient number, since it is larger than the sum of its proper divisors (1).

9966251 is an equidigital number, since it uses as much as digits as its factorization.

9966251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 38.

The square root of 9966251 is about 3156.9369648442. The cubic root of 9966251 is about 215.2008291152.

The spelling of 9966251 in words is "nine million, nine hundred sixty-six thousand, two hundred fifty-one".