Search a number
-
+
666430 = 2566643
BaseRepresentation
bin10100010101100111110
31020212011121
42202230332
5132311210
622141154
75443642
oct2425476
91225147
10666430
11415776
122817ba
131a444b
14134c22
15d26da
hexa2b3e

666430 has 8 divisors (see below), whose sum is σ = 1199592. Its totient is φ = 266568.

The previous prime is 666427. The next prime is 666431. The reversal of 666430 is 34666.

It is a happy number.

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

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 666395 and 666404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33312 + ... + 33331.

It is an arithmetic number, because the mean of its divisors is an integer number (149949).

2666430 is an apocalyptic number.

666430 is a deficient number, since it is larger than the sum of its proper divisors (533162).

666430 is a wasteful number, since it uses less digits than its factorization.

666430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66650.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 666430 is about 816.3516399200. The cubic root of 666430 is about 87.3477078813.

The spelling of 666430 in words is "six hundred sixty-six thousand, four hundred thirty".

Divisors: 1 2 5 10 66643 133286 333215 666430