9661580783 has 4 divisors (see below), whose sum is σ = 9684530328. Its totient is φ = 9638631240.

The previous prime is 9661580771. The next prime is 9661580801. The reversal of 9661580783 is 3870851669.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9661580783 - 2¹⁴ = 9661564399 is a prime.

It is a super-2 number, since 2×9661580783² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661580083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11474141 + ... + 11474982.

It is an arithmetic number, because the mean of its divisors is an integer number (2421132582).

Almost surely, 2^9661580783 is an apocalyptic number.

9661580783 is a deficient number, since it is larger than the sum of its proper divisors (22949545).

9661580783 is a wasteful number, since it uses less digits than its factorization.

9661580783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22949544.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 9661580783 is about 98293.3404814385. The cubic root of 9661580783 is about 2129.8518549937.

The spelling of 9661580783 in words is "nine billion, six hundred sixty-one million, five hundred eighty thousand, seven hundred eighty-three".