9666653251 has 2 divisors, whose sum is σ = 9666653252. Its totient is φ = 9666653250.

The previous prime is 9666653239. The next prime is 9666653261. The reversal of 9666653251 is 1523566669.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9666653251 - 2¹³ = 9666645059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9666653195 and 9666653204.

It is not a weakly prime, because it can be changed into another prime (9666653261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4833326625 + 4833326626.

It is an arithmetic number, because the mean of its divisors is an integer number (4833326626).

Almost surely, 2^9666653251 is an apocalyptic number.

9666653251 is a deficient number, since it is larger than the sum of its proper divisors (1).

9666653251 is an equidigital number, since it uses as much as digits as its factorization.

9666653251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 49.

The square root of 9666653251 is about 98319.1397999393. The cubic root of 9666653251 is about 2130.2245240041.

The spelling of 9666653251 in words is "nine billion, six hundred sixty-six million, six hundred fifty-three thousand, two hundred fifty-one".