3661787 has 4 divisors (see below), whose sum is σ = 3673800. Its totient is φ = 3649776.

The previous prime is 3661781. The next prime is 3661831. The reversal of 3661787 is 7871663.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3661787 - 2⁴ = 3661771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3661787.

It is not an unprimeable number, because it can be changed into a prime (3661781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5537 + ... + 6162.

It is an arithmetic number, because the mean of its divisors is an integer number (918450).

Almost surely, 2^3661787 is an apocalyptic number.

3661787 is a deficient number, since it is larger than the sum of its proper divisors (12013).

3661787 is a wasteful number, since it uses less digits than its factorization.

3661787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12012.

The product of its digits is 42336, while the sum is 38.

The square root of 3661787 is about 1913.5796299083. The cubic root of 3661787 is about 154.1337315896.

The spelling of 3661787 in words is "three million, six hundred sixty-one thousand, seven hundred eighty-seven".