4061664 has 60 divisors (see below), whose sum is σ = 11952864. Its totient is φ = 1353024.

The previous prime is 4061663. The next prime is 4061669. The reversal of 4061664 is 4661604.

4061664 is a `hidden beast` number, since 40 + 616 + 6 + 4 = 666.

It is a super-2 number, since 2×4061664² = 32994228897792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4061663) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1809 + ... + 3375.

Almost surely, 2^4061664 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 4061664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5976432).

4061664 is an abundant number, since it is smaller than the sum of its proper divisors (7891200).

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

4061664 is a wasteful number, since it uses less digits than its factorization.

4061664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 4061664 is about 2015.3570403281. The cubic root of 4061664 is about 159.5516615440.

The spelling of 4061664 in words is "four million, sixty-one thousand, six hundred sixty-four".