9966310725 has 36 divisors (see below), whose sum is σ = 18835904544. Its totient is φ = 4554982080.

The previous prime is 9966310631. The next prime is 9966310733. The reversal of 9966310725 is 5270136699.

It is not a de Polignac number, because 9966310725 - 2¹⁵ = 9966277957 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2285247 + ... + 2289603.

Almost surely, 2^9966310725 is an apocalyptic number.

It is an amenable number.

9966310725 is a deficient number, since it is larger than the sum of its proper divisors (8869593819).

9966310725 is an frugal number, since it uses more digits than its factorization.

9966310725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8734 (or 4372 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 48.

The square root of 9966310725 is about 99831.4115146130. The cubic root of 9966310725 is about 2152.0125899409.

The spelling of 9966310725 in words is "nine billion, nine hundred sixty-six million, three hundred ten thousand, seven hundred twenty-five".