3661345 has 8 divisors (see below), whose sum is σ = 4406400. Its totient is φ = 2920560.

The previous prime is 3661327. The next prime is 3661367. The reversal of 3661345 is 5431663.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-3661345 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1306 + ... + 3004.

It is an arithmetic number, because the mean of its divisors is an integer number (550800).

Almost surely, 2^3661345 is an apocalyptic number.

It is an amenable number.

3661345 is a deficient number, since it is larger than the sum of its proper divisors (745055).

3661345 is a wasteful number, since it uses less digits than its factorization.

3661345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135.

The product of its digits is 6480, while the sum is 28.

The square root of 3661345 is about 1913.4641360632. The cubic root of 3661345 is about 154.1275297132.

It can be divided in two parts, 366 and 1345, that added together give a triangular number (1711 = T₅₈).

The spelling of 3661345 in words is "three million, six hundred sixty-one thousand, three hundred forty-five".