Base | Representation |
---|---|
bin | 110010110110110111110 |
3 | 10010200000000 |
4 | 12112312332 |
5 | 411311434 |
6 | 55415130 |
7 | 20110404 |
oct | 6266676 |
9 | 3120000 |
10 | 1666494 |
11 | a39075 |
12 | 6844a6 |
13 | 4646bb |
14 | 315474 |
15 | 22db99 |
hex | 196dbe |
1666494 has 36 divisors (see below), whose sum is σ = 3778944. Its totient is φ = 551124.
The previous prime is 1666487. The next prime is 1666499. The reversal of 1666494 is 4946661.
It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1666499) by changing a digit.
It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13059 + ... + 13185.
21666494 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1666494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1889472).
1666494 is an abundant number, since it is smaller than the sum of its proper divisors (2112450).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1666494 is an frugal number, since it uses more digits than its factorization.
1666494 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 153 (or 132 counting only the distinct ones).
The product of its digits is 31104, while the sum is 36.
The square root of 1666494 is about 1290.9275734912. The cubic root of 1666494 is about 118.5590156289.
The spelling of 1666494 in words is "one million, six hundred sixty-six thousand, four hundred ninety-four".
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