| Base | Representation |
|---|---|
| bin | 110001100110100… |
| … | …1111000000101100 |
| 3 | 11021222212222102100 |
| 4 | 1203031033000230 |
| 5 | 11402042214430 |
| 6 | 433054055100 |
| 7 | 56150166123 |
| oct | 14315170054 |
| 9 | 4258788370 |
| 10 | 1664413740 |
| 11 | 784577750 |
| 12 | 3a54aa490 |
| 13 | 206a99a02 |
| 14 | 11b0a0aba |
| 15 | 9b1c4960 |
| hex | 6334f02c |
1664413740 has 144 divisors (see below), whose sum is σ = 5551902720. Its totient is φ = 400256640.
The previous prime is 1664413739. The next prime is 1664413741. The reversal of 1664413740 is 473144661.
1664413740 is a `hidden beast` number, since 1 + 6 + 644 + 1 + 3 + 7 + 4 + 0 = 666.
It is an interprime number because it is at equal distance from previous prime (1664413739) and next prime (1664413741).
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a junction number, because it is equal to n+sod(n) for n = 1664413695 and 1664413704.
It is not an unprimeable number, because it can be changed into a prime (1664413741) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 248151 + ... + 254769.
It is an arithmetic number, because the mean of its divisors is an integer number (38554880).
Almost surely, 21664413740 is an apocalyptic number.
1664413740 is a gapful number since it is divisible by the number (10) 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 1664413740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2775951360).
1664413740 is an abundant number, since it is smaller than the sum of its proper divisors (3887488980).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1664413740 is a wasteful number, since it uses less digits than its factorization.
1664413740 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6772 (or 6767 counting only the distinct ones).
The product of its (nonzero) digits is 48384, while the sum is 36.
The square root of 1664413740 is about 40797.2271116555. The cubic root of 1664413740 is about 1185.0966326154.
The spelling of 1664413740 in words is "one billion, six hundred sixty-four million, four hundred thirteen thousand, seven hundred forty".
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