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9999966 = 231987719
BaseRepresentation
bin100110001001…
…011001011110
3200211001101010
4212021121132
510024444331
6554200050
7150666264
oct46113136
920731333
109999966
115710139
123423026
1320c1852
141484434
15d27e46
hex98965e

9999966 has 16 divisors (see below), whose sum is σ = 21052800. Its totient is φ = 3157848.

The previous prime is 9999943. The next prime is 9999971. The reversal of 9999966 is 6699999.

9999966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

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, 43746 + ... + 43973.

It is an arithmetic number, because the mean of its divisors is an integer number (1315800).

Almost surely, 29999966 is an apocalyptic number.

9999966 is an abundant number, since it is smaller than the sum of its proper divisors (11052834).

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

9999966 is a wasteful number, since it uses less digits than its factorization.

9999966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87743.

The product of its digits is 2125764, while the sum is 57.

The square root of 9999966 is about 3162.2722842918. The cubic root of 9999966 is about 215.4432248336.

The spelling of 9999966 in words is "nine million, nine hundred ninety-nine thousand, nine hundred sixty-six".

Divisors: 1 2 3 6 19 38 57 114 87719 175438 263157 526314 1666661 3333322 4999983 9999966