3668686837 has 4 divisors (see below), whose sum is σ = 3669067276. Its totient is φ = 3668306400.

The previous prime is 3668686811. The next prime is 3668686841. The reversal of 3668686837 is 7386868663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7386868663 = 37 ⋅199645099.

It can be written as a sum of positive squares in 2 ways, for example, as 2867174116 + 801512721 = 53546^2 + 28311^2 .

It is a cyclic number.

It is not a de Polignac number, because 3668686837 - 2⁷ = 3668686709 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 (3668686867) 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, 175368 + ... + 195169.

It is an arithmetic number, because the mean of its divisors is an integer number (917266819).

Almost surely, 2^3668686837 is an apocalyptic number.

It is an amenable number.

3668686837 is a deficient number, since it is larger than the sum of its proper divisors (380439).

3668686837 is an equidigital number, since it uses as much as digits as its factorization.

3668686837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380438.

The product of its digits is 41803776, while the sum is 61.

The square root of 3668686837 is about 60569.6857924820. The cubic root of 3668686837 is about 1542.3048128642.

The spelling of 3668686837 in words is "three billion, six hundred sixty-eight million, six hundred eighty-six thousand, eight hundred thirty-seven".