9993649660 has 12 divisors (see below), whose sum is σ = 20986664328. Its totient is φ = 3997459856.

The previous prime is 9993649649. The next prime is 9993649681. The reversal of 9993649660 is 669463999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249841222 + ... + 249841261.

It is an arithmetic number, because the mean of its divisors is an integer number (1748888694).

Almost surely, 2^9993649660 is an apocalyptic number.

It is an amenable number.

9993649660 is an abundant number, since it is smaller than the sum of its proper divisors (10993014668).

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

9993649660 is a wasteful number, since it uses less digits than its factorization.

9993649660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499682492 (or 499682490 counting only the distinct ones).

The product of its (nonzero) digits is 17006112, while the sum is 61.

The square root of 9993649660 is about 99968.2432575465. The cubic root of 9993649660 is about 2153.9785470365.

The spelling of 9993649660 in words is "nine billion, nine hundred ninety-three million, six hundred forty-nine thousand, six hundred sixty".