3555664 has 40 divisors (see below), whose sum is σ = 8035200. Its totient is φ = 1492608.

The previous prime is 3555649. The next prime is 3555677. The reversal of 3555664 is 4665553.

It is a congruent number.

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, 5637 + ... + 6235.

It is an arithmetic number, because the mean of its divisors is an integer number (200880).

Almost surely, 2^3555664 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 3555664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4017600).

3555664 is an abundant number, since it is smaller than the sum of its proper divisors (4479536).

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

3555664 is a wasteful number, since it uses less digits than its factorization.

3555664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 661 counting only the distinct ones).

The product of its digits is 54000, while the sum is 34.

The square root of 3555664 is about 1885.6468386206. The cubic root of 3555664 is about 152.6301173818.

The spelling of 3555664 in words is "three million, five hundred fifty-five thousand, six hundred sixty-four".