9661385629 has 8 divisors (see below), whose sum is σ = 11052666368. Its totient is φ = 8272875600.

The previous prime is 9661385623. The next prime is 9661385707. The reversal of 9661385629 is 9265831669.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9661385629 - 2⁵ = 9661385597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9661385629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661385623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685197 + ... + 699154.

It is an arithmetic number, because the mean of its divisors is an integer number (1381583296).

Almost surely, 2^9661385629 is an apocalyptic number.

It is an amenable number.

9661385629 is a deficient number, since it is larger than the sum of its proper divisors (1391280739).

9661385629 is a wasteful number, since it uses less digits than its factorization.

9661385629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385355.

The product of its digits is 4199040, while the sum is 55.

The square root of 9661385629 is about 98292.3477642080. The cubic root of 9661385629 is about 2129.8375146244.

The spelling of 9661385629 in words is "nine billion, six hundred sixty-one million, three hundred eighty-five thousand, six hundred twenty-nine".