3683787661 has 8 divisors (see below), whose sum is σ = 3762597600. Its totient is φ = 3605523600.

The previous prime is 3683787649. The next prime is 3683787671. The reversal of 3683787661 is 1667873863.

3683787661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3683787661 - 2⁷ = 3683787533 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 (3683787641) 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, 122815 + ... + 149836.

It is an arithmetic number, because the mean of its divisors is an integer number (470324700).

Almost surely, 2^3683787661 is an apocalyptic number.

It is an amenable number.

3683787661 is a deficient number, since it is larger than the sum of its proper divisors (78809939).

3683787661 is a wasteful number, since it uses less digits than its factorization.

3683787661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272939.

The product of its digits is 6096384, while the sum is 55.

The square root of 3683787661 is about 60694.2143947840. The cubic root of 3683787661 is about 1544.4180296074.

The spelling of 3683787661 in words is "three billion, six hundred eighty-three million, seven hundred eighty-seven thousand, six hundred sixty-one".