9999667500 has 60 divisors (see below), whose sum is σ = 29156385720. Its totient is φ = 2666576000.

The previous prime is 9999667487. The next prime is 9999667547. The reversal of 9999667500 is 57669999.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×9999667500² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 659145 + ... + 674144.

It is an arithmetic number, because the mean of its divisors is an integer number (485939762).

Almost surely, 2^9999667500 is an apocalyptic number.

It is an amenable number.

9999667500 is an abundant number, since it is smaller than the sum of its proper divisors (19156718220).

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

9999667500 is a wasteful number, since it uses less digits than its factorization.

9999667500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333316 (or 1333299 counting only the distinct ones).

The product of its (nonzero) digits is 8266860, while the sum is 60.

The square root of 9999667500 is about 99998.3374861802. The cubic root of 9999667500 is about 2154.4108114494.

The spelling of 9999667500 in words is "nine billion, nine hundred ninety-nine million, six hundred sixty-seven thousand, five hundred".