3661683891 has 16 divisors (see below), whose sum is σ = 4951503360. Its totient is φ = 2406587040.

The previous prime is 3661683889. The next prime is 3661683911. The reversal of 3661683891 is 1983861663.

3661683891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3661683891 - 2¹ = 3661683889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3661683491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150561 + ... + 173181.

It is an arithmetic number, because the mean of its divisors is an integer number (309468960).

Almost surely, 2^3661683891 is an apocalyptic number.

3661683891 is a deficient number, since it is larger than the sum of its proper divisors (1289819469).

3661683891 is a wasteful number, since it uses less digits than its factorization.

3661683891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23386.

The product of its digits is 1119744, while the sum is 51.

The square root of 3661683891 is about 60511.8491784873. The cubic root of 3661683891 is about 1541.3228487118.

The spelling of 3661683891 in words is "three billion, six hundred sixty-one million, six hundred eighty-three thousand, eight hundred ninety-one".