9661414459 has 4 divisors (see below), whose sum is σ = 9746913816. Its totient is φ = 9575915104.

The previous prime is 9661414457. The next prime is 9661414463. The reversal of 9661414459 is 9544141669.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9544141669 = 43 ⋅221956783.

It is a cyclic number.

It is not a de Polignac number, because 9661414459 - 2¹ = 9661414457 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9661414453) 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, 42749509 + ... + 42749734.

It is an arithmetic number, because the mean of its divisors is an integer number (2436728454).

Almost surely, 2^9661414459 is an apocalyptic number.

9661414459 is a deficient number, since it is larger than the sum of its proper divisors (85499357).

9661414459 is a wasteful number, since it uses less digits than its factorization.

9661414459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85499356.

The product of its digits is 933120, while the sum is 49.

The square root of 9661414459 is about 98292.4944184448. The cubic root of 9661414459 is about 2129.8396331320.

The spelling of 9661414459 in words is "nine billion, six hundred sixty-one million, four hundred fourteen thousand, four hundred fifty-nine".