9661836773 has 4 divisors (see below), whose sum is σ = 9806043360. Its totient is φ = 9517630188.

The previous prime is 9661836721. The next prime is 9661836791. The reversal of 9661836773 is 3776381669.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3776381669 = 13591 ⋅277859.

It is a cyclic number.

It is not a de Polignac number, because 9661836773 - 2⁸ = 9661836517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661836703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72103193 + ... + 72103326.

It is an arithmetic number, because the mean of its divisors is an integer number (2451510840).

Almost surely, 2^9661836773 is an apocalyptic number.

It is an amenable number.

9661836773 is a deficient number, since it is larger than the sum of its proper divisors (144206587).

9661836773 is a wasteful number, since it uses less digits than its factorization.

9661836773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144206586.

The product of its digits is 6858432, while the sum is 56.

The square root of 9661836773 is about 98294.6426464840. The cubic root of 9661836773 is about 2129.8706654407.

The spelling of 9661836773 in words is "nine billion, six hundred sixty-one million, eight hundred thirty-six thousand, seven hundred seventy-three".