9966650598 has 24 divisors (see below), whose sum is σ = 22291004736. Its totient is φ = 3215048400.

The previous prime is 9966650591. The next prime is 9966650623. The reversal of 9966650598 is 8950566699.

It is a super-2 number, since 2×9966650598² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9966650591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8930133 + ... + 8931248.

It is an arithmetic number, because the mean of its divisors is an integer number (928791864).

Almost surely, 2^9966650598 is an apocalyptic number.

9966650598 is an abundant number, since it is smaller than the sum of its proper divisors (12324354138).

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

9966650598 is a wasteful number, since it uses less digits than its factorization.

9966650598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17861420 (or 17861417 counting only the distinct ones).

The product of its (nonzero) digits is 31492800, while the sum is 63.

The square root of 9966650598 is about 99833.1137348726. The cubic root of 9966650598 is about 2152.0370524420.

The spelling of 9966650598 in words is "nine billion, nine hundred sixty-six million, six hundred fifty thousand, five hundred ninety-eight".