9615666499 has 2 divisors, whose sum is σ = 9615666500. Its totient is φ = 9615666498.

The previous prime is 9615666479. The next prime is 9615666517. The reversal of 9615666499 is 9946665169.

9615666499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9615666499 - 2²¹ = 9613569347 is a prime.

It is a super-2 number, since 2×9615666499² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9615666439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4807833249 + 4807833250.

It is an arithmetic number, because the mean of its divisors is an integer number (4807833250).

Almost surely, 2^9615666499 is an apocalyptic number.

9615666499 is a deficient number, since it is larger than the sum of its proper divisors (1).

9615666499 is an equidigital number, since it uses as much as digits as its factorization.

9615666499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18895680, while the sum is 61.

The square root of 9615666499 is about 98059.5048886134. The cubic root of 9615666499 is about 2126.4726308257.

The spelling of 9615666499 in words is "nine billion, six hundred fifteen million, six hundred sixty-six thousand, four hundred ninety-nine".