3533661 has 6 divisors (see below), whose sum is σ = 5104190. Its totient is φ = 2355768.

The previous prime is 3533657. The next prime is 3533683. The reversal of 3533661 is 1663353.

It can be written as a sum of positive squares in only one way, i.e., 2268036 + 1265625 = 1506^2 + 1125^2 .

It is not a de Polignac number, because 3533661 - 2² = 3533657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3533561) 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, 196306 + ... + 196323.

Almost surely, 2^3533661 is an apocalyptic number.

It is an amenable number.

3533661 is a deficient number, since it is larger than the sum of its proper divisors (1570529).

3533661 is a wasteful number, since it uses less digits than its factorization.

3533661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392635 (or 392632 counting only the distinct ones).

The product of its digits is 4860, while the sum is 27.

The square root of 3533661 is about 1879.8034471721. The cubic root of 3533661 is about 152.3146327863.

The spelling of 3533661 in words is "three million, five hundred thirty-three thousand, six hundred sixty-one".