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2166666 = 23361111
BaseRepresentation
bin1000010000111110001010
311002002002220
420100332022
51023313131
6114234510
724262545
oct10207612
94062086
102166666
11124a937
12885a36
135ab268
1440585c
152cbe96
hex210f8a

2166666 has 8 divisors (see below), whose sum is σ = 4333344. Its totient is φ = 722220.

The previous prime is 2166629. The next prime is 2166673. The reversal of 2166666 is 6666612.

It is a sphenic number, since it is the product of 3 distinct primes.

2166666 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

2166666 is a modest number, since divided by 6666 gives 216 as remainder.

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, 180550 + ... + 180561.

It is an arithmetic number, because the mean of its divisors is an integer number (541668).

22166666 is an apocalyptic number.

2166666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2166666 is a wasteful number, since it uses less digits than its factorization.

2166666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361116.

The product of its digits is 15552, while the sum is 33.

The square root of 2166666 is about 1471.9599179326. The cubic root of 2166666 is about 129.3989213393.

The spelling of 2166666 in words is "two million, one hundred sixty-six thousand, six hundred sixty-six".

Divisors: 1 2 3 6 361111 722222 1083333 2166666