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BaseRepresentation
bin10000001101111110
310101010101
4100031332
54111210
61231314
7364450
oct201576
9111111
1066430
1145a01
123253a
1324310
141a2d0
1514a3a
hex1037e

66430 has 32 divisors (see below), whose sum is σ = 149184. Its totient is φ = 20736.

The previous prime is 66413. The next prime is 66431. The reversal of 66430 is 3466.

It is a happy number.

66430 is nontrivially palindromic in base 3 and base 9.

66430 is an esthetic number in base 3, because in such base its adjacent digits differ by 1.

66430 is a nontrivial binomial coefficient, being equal to C(365, 2).

66430 is an undulating number in base 3.

66430 is a nontrivial repdigit in base 9.

It is a plaindrome in base 9.

It is a nialpdrome in base 9 and base 10.

It is a zygodrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 66398 and 66407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66431) by changing a digit.

It is a nontrivial repunit in base 9.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 874 + ... + 946.

It is an arithmetic number, because the mean of its divisors is an integer number (4662).

266430 is an apocalyptic number.

66430 is the 364-th triangular number.

66430 is the 122-nd centered nonagonal number.

66430 is an abundant number, since it is smaller than the sum of its proper divisors (82754).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74592).

66430 is a wasteful number, since it uses less digits than its factorization.

66430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 66430 is about 257.7401792503. The cubic root of 66430 is about 40.4999745974.

Adding to 66430 its reverse (3466), we get a palindrome (69896).

It can be divided in two parts, 66 and 430, that added together give a triangular number (496 = T31).

The spelling of 66430 in words is "sixty-six thousand, four hundred thirty".