Search a number
-
+
1666494 = 238127
BaseRepresentation
bin110010110110110111110
310010200000000
412112312332
5411311434
655415130
720110404
oct6266676
93120000
101666494
11a39075
126844a6
134646bb
14315474
1522db99
hex196dbe

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".

Divisors: 1 2 3 6 9 18 27 54 81 127 162 243 254 381 486 729 762 1143 1458 2187 2286 3429 4374 6561 6858 10287 13122 20574 30861 61722 92583 185166 277749 555498 833247 1666494