9967888811 has 4 divisors (see below), whose sum is σ = 9970770672. Its totient is φ = 9965006952.

The previous prime is 9967888739. The next prime is 9967888873. The reversal of 9967888811 is 1188887699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1188887699 = 641 ⋅1854739.

It is a cyclic number.

It is not a de Polignac number, because 9967888811 - 2¹⁸ = 9967626667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9907888811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1435736 + ... + 1442661.

It is an arithmetic number, because the mean of its divisors is an integer number (2492692668).

Almost surely, 2^9967888811 is an apocalyptic number.

9967888811 is a deficient number, since it is larger than the sum of its proper divisors (2881861).

9967888811 is a wasteful number, since it uses less digits than its factorization.

9967888811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881860.

The product of its digits is 13934592, while the sum is 65.

The square root of 9967888811 is about 99839.3149565841. The cubic root of 9967888811 is about 2152.1261686362.

It can be divided in two parts, 9967888 and 811, that added together give a palindrome (9968699).

The spelling of 9967888811 in words is "nine billion, nine hundred sixty-seven million, eight hundred eighty-eight thousand, eight hundred eleven".