12017664 has 84 divisors (see below), whose sum is σ = 34928556. Its totient is φ = 3981312.

The previous prime is 12017659. The next prime is 12017669. The reversal of 12017664 is 46671021.

It is an interprime number because it is at equal distance from previous prime (12017659) and next prime (12017669).

It is a nialpdrome in base 16.

It is a zygodrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12017669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73647 + ... + 73809.

Almost surely, 2^12017664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12017664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17464278).

12017664 is an abundant number, since it is smaller than the sum of its proper divisors (22910892).

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

12017664 is an equidigital number, since it uses as much as digits as its factorization.

12017664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 12017664 is about 3466.6502563714. The cubic root of 12017664 is about 229.0551280612.

Adding to 12017664 its reverse (46671021), we get a palindrome (58688685).

The spelling of 12017664 in words is "twelve million, seventeen thousand, six hundred sixty-four".