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6220665 = 335115971
BaseRepresentation
bin10111101110101101111001
3102201001011000
4113232231321
53043030130
6341155213
7103606023
oct27565571
912631130
106220665
113569750
1220bbb09
13139a589
14b7d013
1582d260
hex5eeb79

6220665 has 64 divisors (see below), whose sum is σ = 12441600. Its totient is φ = 2923200.

The previous prime is 6220661. The next prime is 6220673. The reversal of 6220665 is 5660226.

6220665 is an admirable number.

It is not a de Polignac number, because 6220665 - 22 = 6220661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

6220665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6220661) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 87580 + ... + 87650.

It is an arithmetic number, because the mean of its divisors is an integer number (194400).

Almost surely, 26220665 is an apocalyptic number.

It is an amenable number.

6220665 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

6220665 is a wasteful number, since it uses less digits than its factorization.

6220665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 6220665 is about 2494.1260994585. The cubic root of 6220665 is about 183.9129333665.

The spelling of 6220665 in words is "six million, two hundred twenty thousand, six hundred sixty-five".

Divisors: 1 3 5 9 11 15 27 33 45 55 59 71 99 135 165 177 213 295 297 355 495 531 639 649 781 885 1065 1485 1593 1917 1947 2343 2655 3195 3245 3905 4189 5841 7029 7965 9585 9735 11715 12567 17523 20945 21087 29205 35145 37701 46079 62835 87615 105435 113103 138237 188505 230395 414711 565515 691185 1244133 2073555 6220665