Search a number
-
+
663005 = 5719997
BaseRepresentation
bin10100001110111011101
31020200110202
42201313131
5132204010
622113245
75430650
oct2416735
91220422
10663005
11413142
1227b825
131a2a15
14133897
15d16a5
hexa1ddd

663005 has 16 divisors (see below), whose sum is σ = 958080. Its totient is φ = 430272.

The previous prime is 663001. The next prime is 663007. The reversal of 663005 is 500366.

It is a cyclic number.

It is not a de Polignac number, because 663005 - 22 = 663001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167 + ... + 1163.

It is an arithmetic number, because the mean of its divisors is an integer number (59880).

2663005 is an apocalyptic number.

663005 is the 665-th pentagonal number.

It is an amenable number.

663005 is a deficient number, since it is larger than the sum of its proper divisors (295075).

663005 is a wasteful number, since it uses less digits than its factorization.

663005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 663005 is about 814.2511897443. The cubic root of 663005 is about 87.1978147336.

The spelling of 663005 in words is "six hundred sixty-three thousand, five".

Divisors: 1 5 7 19 35 95 133 665 997 4985 6979 18943 34895 94715 132601 663005