| Base | Representation |
|---|---|
| bin | 100111101011010… |
| … | …101000101110000 |
| 3 | 1201101120112120110 |
| 4 | 213223111011300 |
| 5 | 2330402420000 |
| 6 | 150015341320 |
| 7 | 22332046602 |
| oct | 4753250560 |
| 9 | 1641515513 |
| 10 | 665670000 |
| 11 | 3118317a6 |
| 12 | 166b21840 |
| 13 | a7bac598 |
| 14 | 6459d172 |
| 15 | 3d690850 |
| hex | 27ad5170 |
665670000 has 100 divisors (see below), whose sum is σ = 2148968360. Its totient is φ = 177504000.
The previous prime is 665669999. The next prime is 665670001. The reversal of 665670000 is 76566.
665670000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is an interprime number because it is at equal distance from previous prime (665669999) and next prime (665670001).
It is a tau number, because it is divible by the number of its divisors (100).
It is a Harshad number since it is a multiple of its sum of digits (30).
It is a self number, because there is not a number n which added to its sum of digits gives 665670000.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (665670001) by changing a digit.
It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18906 + ... + 41094.
Almost surely, 2665670000 is an apocalyptic number.
665670000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 665670000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1074484180).
665670000 is an abundant number, since it is smaller than the sum of its proper divisors (1483298360).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
665670000 is a wasteful number, since it uses less digits than its factorization.
665670000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 22220 (or 22199 counting only the distinct ones).
The product of its (nonzero) digits is 7560, while the sum is 30.
The square root of 665670000 is about 25800.5813887982. The cubic root of 665670000 is about 873.1449133494.
The spelling of 665670000 in words is "six hundred sixty-five million, six hundred seventy thousand".
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