9640666172 has 24 divisors (see below), whose sum is σ = 16978574592. Its totient is φ = 4789702400.

The previous prime is 9640666117. The next prime is 9640666181. The reversal of 9640666172 is 2716660469.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721472 + ... + 734712.

It is an arithmetic number, because the mean of its divisors is an integer number (707440608).

Almost surely, 2^9640666172 is an apocalyptic number.

It is an amenable number.

9640666172 is a deficient number, since it is larger than the sum of its proper divisors (7337908420).

9640666172 is a wasteful number, since it uses less digits than its factorization.

9640666172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14389 (or 14387 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 9640666172 is about 98186.8940948842. The cubic root of 9640666172 is about 2128.3139008625.

The spelling of 9640666172 in words is "nine billion, six hundred forty million, six hundred sixty-six thousand, one hundred seventy-two".