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669960 = 233251861
BaseRepresentation
bin10100011100100001000
31021001000100
42203210020
5132414320
622205400
75460144
oct2434410
91231010
10669960
11418395
12283860
131a5c35
14136224
15d3790
hexa3908

669960 has 48 divisors (see below), whose sum is σ = 2178540. Its totient is φ = 178560.

The previous prime is 669947. The next prime is 669971. The reversal of 669960 is 69966.

It can be written as a sum of positive squares in 2 ways, for example, as 544644 + 125316 = 738^2 + 354^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669960.

It is an unprimeable number.

669960 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 571 + ... + 1290.

2669960 is an apocalyptic number.

669960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

669960 is an abundant number, since it is smaller than the sum of its proper divisors (1508580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669960 is a wasteful number, since it uses less digits than its factorization.

669960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878 (or 1871 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 669960 is about 818.5108429337. The cubic root of 669960 is about 87.5016598325.

The spelling of 669960 in words is "six hundred sixty-nine thousand, nine hundred sixty".

Divisors: 1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 45 60 72 90 120 180 360 1861 3722 5583 7444 9305 11166 14888 16749 18610 22332 27915 33498 37220 44664 55830 66996 74440 83745 111660 133992 167490 223320 334980 669960