Search a number
-
+
9666221 = 30013221
BaseRepresentation
bin100100110111…
…111010101101
3200012002120012
4210313322231
54433304341
6543103005
7145106255
oct44677255
920162505
109666221
115502414
1232a1a65
132005976
1413d8965
15cae0eb
hex937ead

9666221 has 4 divisors (see below), whose sum is σ = 9672444. Its totient is φ = 9660000.

The previous prime is 9666197. The next prime is 9666227. The reversal of 9666221 is 1226669.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6375625 + 3290596 = 2525^2 + 1814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-9666221 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9666227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1391 + ... + 4611.

It is an arithmetic number, because the mean of its divisors is an integer number (2418111).

Almost surely, 29666221 is an apocalyptic number.

It is an amenable number.

9666221 is a deficient number, since it is larger than the sum of its proper divisors (6223).

9666221 is a wasteful number, since it uses less digits than its factorization.

9666221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6222.

The product of its digits is 7776, while the sum is 32.

The square root of 9666221 is about 3109.0546794806. The cubic root of 9666221 is about 213.0192772049.

The spelling of 9666221 in words is "nine million, six hundred sixty-six thousand, two hundred twenty-one".

Divisors: 1 3001 3221 9666221