3661887 has 8 divisors (see below), whose sum is σ = 4944640. Its totient is φ = 2410200.

The previous prime is 3661871. The next prime is 3661907. The reversal of 3661887 is 7881663.

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

It is not a de Polignac number, because 3661887 - 2⁴ = 3661871 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 (3662887) 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, 7489 + ... + 7962.

It is an arithmetic number, because the mean of its divisors is an integer number (618080).

Almost surely, 2^3661887 is an apocalyptic number.

3661887 is a deficient number, since it is larger than the sum of its proper divisors (1282753).

3661887 is a wasteful number, since it uses less digits than its factorization.

3661887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15533.

The product of its digits is 48384, while the sum is 39.

The square root of 3661887 is about 1913.6057587706. The cubic root of 3661887 is about 154.1351346598.

The spelling of 3661887 in words is "three million, six hundred sixty-one thousand, eight hundred eighty-seven".