3678661 has 8 divisors (see below), whose sum is σ = 4233600. Its totient is φ = 3131088.

The previous prime is 3678659. The next prime is 3678671. The reversal of 3678661 is 1668763.

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

It is a cyclic number.

It is not a de Polignac number, because 3678661 - 2¹ = 3678659 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3678661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3678601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721 + ... + 2806.

It is an arithmetic number, because the mean of its divisors is an integer number (529200).

Almost surely, 2^3678661 is an apocalyptic number.

It is an amenable number.

3678661 is a deficient number, since it is larger than the sum of its proper divisors (554939).

3678661 is a wasteful number, since it uses less digits than its factorization.

3678661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3683.

The product of its digits is 36288, while the sum is 37.

The square root of 3678661 is about 1917.9835765720. The cubic root of 3678661 is about 154.3701250735.

The spelling of 3678661 in words is "three million, six hundred seventy-eight thousand, six hundred sixty-one".