9916770251 has 2 divisors, whose sum is σ = 9916770252. Its totient is φ = 9916770250.

The previous prime is 9916770179. The next prime is 9916770271. The reversal of 9916770251 is 1520776199.

It is a strong prime.

It is an emirp because it is prime and its reverse (1520776199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9916770251 - 2²⁶ = 9849661387 is a prime.

It is a super-2 number, since 2×9916770251² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9916770196 and 9916770205.

It is not a weakly prime, because it can be changed into another prime (9916770271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4958385125 + 4958385126.

It is an arithmetic number, because the mean of its divisors is an integer number (4958385126).

Almost surely, 2^9916770251 is an apocalyptic number.

9916770251 is a deficient number, since it is larger than the sum of its proper divisors (1).

9916770251 is an equidigital number, since it uses as much as digits as its factorization.

9916770251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 47.

The square root of 9916770251 is about 99582.9817338284. The cubic root of 9916770251 is about 2148.4409285560.

The spelling of 9916770251 in words is "nine billion, nine hundred sixteen million, seven hundred seventy thousand, two hundred fifty-one".