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665956 = 22295741
BaseRepresentation
bin10100010100101100100
31020211112001
42202211210
5132302311
622135044
75442364
oct2424544
91224461
10665956
11415385
12281484
131a4175
141349a4
15d24c1
hexa2964

665956 has 12 divisors (see below), whose sum is σ = 1205820. Its totient is φ = 321440.

The previous prime is 665953. The next prime is 665981. The reversal of 665956 is 659566.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 341056 + 324900 = 584^2 + 570^2 .

It is not an unprimeable number, because it can be changed into a prime (665953) 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, 2755 + ... + 2986.

It is an arithmetic number, because the mean of its divisors is an integer number (100485).

2665956 is an apocalyptic number.

It is an amenable number.

665956 is a deficient number, since it is larger than the sum of its proper divisors (539864).

665956 is a wasteful number, since it uses less digits than its factorization.

665956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5774 (or 5772 counting only the distinct ones).

The product of its digits is 48600, while the sum is 37.

The square root of 665956 is about 816.0612722094. The cubic root of 665956 is about 87.3269942113.

The spelling of 665956 in words is "six hundred sixty-five thousand, nine hundred fifty-six".

Divisors: 1 2 4 29 58 116 5741 11482 22964 166489 332978 665956