9666347355625 has 15 divisors (see below), whose sum is σ = 12079164783873. Its totient is φ = 7733015703000.

The previous prime is 9666347355617. The next prime is 9666347355647. The reversal of 9666347355625 is 5265537436669.

The square root of 9666347355625 is 3109075.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 757841632681 + 8908505722944 = 870541^2 + 2984712^2 .

It is not a de Polignac number, because 9666347355625 - 2³ = 9666347355617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 77664694 + ... + 77789056.

Almost surely, 2^{9666347355625} is an apocalyptic number.

9666347355625 is the 3109075-th square number.

9666347355625 is the 1554538-th centered octagonal number.

It is an amenable number.

9666347355625 is a deficient number, since it is larger than the sum of its proper divisors (2412817428248).

9666347355625 is an frugal number, since it uses more digits than its factorization.

9666347355625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248746 (or 124368 counting only the distinct ones).

The product of its digits is 734832000, while the sum is 67.

The spelling of 9666347355625 in words is "nine trillion, six hundred sixty-six billion, three hundred forty-seven million, three hundred fifty-five thousand, six hundred twenty-five".