3665889837 has 12 divisors (see below), whose sum is σ = 5367711804. Its totient is φ = 2410447680.

The previous prime is 3665889833. The next prime is 3665889847. The reversal of 3665889837 is 7389885663.

It can be written as a sum of positive squares in 2 ways, for example, as 2163087081 + 1502802756 = 46509^2 + 38766^2 .

It is not a de Polignac number, because 3665889837 - 2² = 3665889833 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665889833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2789214 + ... + 2790527.

It is an arithmetic number, because the mean of its divisors is an integer number (447309317).

Almost surely, 2^3665889837 is an apocalyptic number.

It is an amenable number.

3665889837 is a deficient number, since it is larger than the sum of its proper divisors (1701821967).

3665889837 is a wasteful number, since it uses less digits than its factorization.

3665889837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579820 (or 5579817 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The square root of 3665889837 is about 60546.5922823077. The cubic root of 3665889837 is about 1541.9127631107.

The spelling of 3665889837 in words is "three billion, six hundred sixty-five million, eight hundred eighty-nine thousand, eight hundred thirty-seven".