| Base | Representation |
|---|---|
| bin | 110001100000100… |
| … | …0111000101100000 |
| 3 | 11021202220111202200 |
| 4 | 1203001013011200 |
| 5 | 11400234014202 |
| 6 | 432502013200 |
| 7 | 56111161224 |
| oct | 14301070540 |
| 9 | 4252814680 |
| 10 | 1661235552 |
| 11 | 7827a6949 |
| 12 | 3a4417200 |
| 13 | 206226222 |
| 14 | 11a8b4784 |
| 15 | 9ac97e1c |
| hex | 63047160 |
1661235552 has 72 divisors (see below), whose sum is σ = 4777292520. Its totient is φ = 547514880.
The previous prime is 1661235547. The next prime is 1661235553. The reversal of 1661235552 is 2555321661.
1661235552 is a `hidden beast` number, since 1 + 6 + 612 + 35 + 5 + 5 + 2 = 666.
It is a tau number, because it is divible by the number of its divisors (72).
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1661235553) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6774 + ... + 58037.
It is an arithmetic number, because the mean of its divisors is an integer number (66351285).
Almost surely, 21661235552 is an apocalyptic number.
1661235552 is a gapful number since it is divisible by the number (12) 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 1661235552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2388646260).
1661235552 is an abundant number, since it is smaller than the sum of its proper divisors (3116056968).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1661235552 is a wasteful number, since it uses less digits than its factorization.
1661235552 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 64916 (or 64905 counting only the distinct ones).
The product of its digits is 54000, while the sum is 36.
The square root of 1661235552 is about 40758.2574701127. The cubic root of 1661235552 is about 1184.3418403630.
The spelling of 1661235552 in words is "one billion, six hundred sixty-one million, two hundred thirty-five thousand, five hundred fifty-two".
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