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663320026 = 28922916273
BaseRepresentation
bin100111100010010…
…111010111011010
31201020011011000101
4213202113113122
52324302220101
6145453130014
722303061425
oct4742272732
91636134011
10663320026
11310477176
1216618990a
13a7568a75
146414a9bc
153d379401
hex278975da

663320026 has 16 divisors (see below), whose sum is σ = 1010615400. Its totient is φ = 326481408.

The previous prime is 663320003. The next prime is 663320027. The reversal of 663320026 is 620023366.

It is a Cunningham number, because it is equal to 257552+1.

It can be written as a sum of positive squares in 4 ways, for example, as 663320025 + 1 = 25755^2 + 1^2 .

It is a junction number, because it is equal to n+sod(n) for n = 663319976 and 663320003.

It is not an unprimeable number, because it can be changed into a prime (663320027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32626 + ... + 48898.

Almost surely, 2663320026 is an apocalyptic number.

663320026 is a deficient number, since it is larger than the sum of its proper divisors (347295374).

663320026 is a wasteful number, since it uses less digits than its factorization.

663320026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16593.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 663320026 is about 25755.0000194137. Note that the first 4 decimals coincide. The cubic root of 663320026 is about 872.1162319112.

The spelling of 663320026 in words is "six hundred sixty-three million, three hundred twenty thousand, twenty-six".

Divisors: 1 2 89 178 229 458 16273 20381 32546 40762 1448297 2896594 3726517 7453034 331660013 663320026