37664 has 24 divisors (see below), whose sum is σ = 81648.
Its totient is φ = 16960.
The previous prime is 37663. The next prime is 37691. The reversal of 37664 is 46673.
It is a nialpdrome in base 16.
It is not an unprimeable number, because it can be changed into a prime (37663) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299 + ... + 405.
It is an arithmetic number, because the mean of its divisors is an integer number (3402).
237664 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 37664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40824).
37664 is an abundant number, since it is smaller than the sum of its proper divisors (43984).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
37664 is a wasteful number, since it uses less digits than its factorization.
37664 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 128 (or 120 counting only the distinct ones).
The product of its digits is 3024, while the sum is 26.
The square root of 37664 is about 194.0721515313.
The cubic root of 37664 is about 33.5203707692.
Subtracting 37664 from its reverse (46673), we obtain a palindrome (9009).
It can be divided in two parts, 3 and 7664, that added together give a palindrome (7667).
The spelling of 37664 in words is "thirty-seven thousand, six hundred sixty-four".