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64668 = 22317317
BaseRepresentation
bin1111110010011100
310021201010
433302130
54032133
61215220
7356352
oct176234
9107633
1064668
114464a
1231510
1323586
14197d2
1514263
hexfc9c

64668 has 24 divisors (see below), whose sum is σ = 160272. Its totient is φ = 20224.

The previous prime is 64667. The next prime is 64679. The reversal of 64668 is 86646.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46 + ... + 362.

It is an arithmetic number, because the mean of its divisors is an integer number (6678).

264668 is an apocalyptic number.

64668 is a gapful number since it is divisible by the number (68) 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 64668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80136).

64668 is an abundant number, since it is smaller than the sum of its proper divisors (95604).

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

64668 is a wasteful number, since it uses less digits than its factorization.

64668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 339 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 64668 is about 254.2990365692. The cubic root of 64668 is about 40.1386852708.

The spelling of 64668 in words is "sixty-four thousand, six hundred sixty-eight".

Divisors: 1 2 3 4 6 12 17 34 51 68 102 204 317 634 951 1268 1902 3804 5389 10778 16167 21556 32334 64668