9990173660 has 24 divisors (see below), whose sum is σ = 21467258736. Its totient is φ = 3903137280.

The previous prime is 9990173639. The next prime is 9990173681. The reversal of 9990173660 is 663710999.

It is an interprime number because it is at equal distance from previous prime (9990173639) and next prime (9990173681).

It is a junction number, because it is equal to n+sod(n) for n = 9990173599 and 9990173608.

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, 5807381 + ... + 5809100.

It is an arithmetic number, because the mean of its divisors is an integer number (894469114).

Almost surely, 2^9990173660 is an apocalyptic number.

It is an amenable number.

9990173660 is an abundant number, since it is smaller than the sum of its proper divisors (11477085076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9990173660 is a wasteful number, since it uses less digits than its factorization.

9990173660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11616533 (or 11616531 counting only the distinct ones).

The product of its (nonzero) digits is 551124, while the sum is 50.

The square root of 9990173660 is about 99950.8562244466. The cubic root of 9990173660 is about 2153.7287851736.

The spelling of 9990173660 in words is "nine billion, nine hundred ninety million, one hundred seventy-three thousand, six hundred sixty".