9656946687 has 4 divisors (see below), whose sum is σ = 12875928920. Its totient is φ = 6437964456.

The previous prime is 9656946667. The next prime is 9656946701. The reversal of 9656946687 is 7866496569.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7866496569 = 3 ⋅2622165523.

It is not a de Polignac number, because 9656946687 - 2⁶ = 9656946623 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 (9656946667) 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, 1609491112 + ... + 1609491117.

It is an arithmetic number, because the mean of its divisors is an integer number (3218982230).

Almost surely, 2^9656946687 is an apocalyptic number.

9656946687 is a deficient number, since it is larger than the sum of its proper divisors (3218982233).

9656946687 is a wasteful number, since it uses less digits than its factorization.

9656946687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218982232.

The product of its digits is 117573120, while the sum is 66.

The square root of 9656946687 is about 98269.7648669213. The cubic root of 9656946687 is about 2129.5112786906.

The spelling of 9656946687 in words is "nine billion, six hundred fifty-six million, nine hundred forty-six thousand, six hundred eighty-seven".