4018664 has 32 divisors (see below), whose sum is σ = 8595720. Its totient is φ = 1744896.

The previous prime is 4018649. The next prime is 4018699. The reversal of 4018664 is 4668104.

It can be written as a sum of positive squares in 4 ways, for example, as 3833764 + 184900 = 1958^2 + 430^2 .

It is a super-2 number, since 2×4018664² = 32299320689792, which contains 22 as substring.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632 + ... + 2904.

Almost surely, 2^4018664 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 4018664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4297860).

4018664 is an abundant number, since it is smaller than the sum of its proper divisors (4577056).

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

4018664 is a wasteful number, since it uses less digits than its factorization.

4018664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309 (or 2305 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 4018664 is about 2004.6605697723. The cubic root of 4018664 is about 158.9866159640.

The spelling of 4018664 in words is "four million, eighteen thousand, six hundred sixty-four".