9611985667 has 2 divisors, whose sum is σ = 9611985668. Its totient is φ = 9611985666.

The previous prime is 9611985641. The next prime is 9611985673. The reversal of 9611985667 is 7665891169.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9611985667 is a prime.

It is a super-2 number, since 2×9611985667² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9611980667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4805992833 + 4805992834.

It is an arithmetic number, because the mean of its divisors is an integer number (4805992834).

Almost surely, 2^9611985667 is an apocalyptic number.

9611985667 is a deficient number, since it is larger than the sum of its proper divisors (1).

9611985667 is an equidigital number, since it uses as much as digits as its factorization.

9611985667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 58.

The square root of 9611985667 is about 98040.7347330690. The cubic root of 9611985667 is about 2126.2012616160.

The spelling of 9611985667 in words is "nine billion, six hundred eleven million, nine hundred eighty-five thousand, six hundred sixty-seven".