3665832681 has 16 divisors (see below), whose sum is σ = 5606205824. Its totient is φ = 2087195904.

The previous prime is 3665832671. The next prime is 3665832691. The reversal of 3665832681 is 1862385663.

It is an interprime number because it is at equal distance from previous prime (3665832671) and next prime (3665832691).

It is not a de Polignac number, because 3665832681 - 2¹¹ = 3665830633 is a prime.

It is a super-2 number, since 2×3665832681² = 26876658490175295522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 3665832681.

It is not an unprimeable number, because it can be changed into a prime (3665832671) 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, 309280 + ... + 320913.

It is an arithmetic number, because the mean of its divisors is an integer number (350387864).

Almost surely, 2^3665832681 is an apocalyptic number.

It is an amenable number.

3665832681 is a deficient number, since it is larger than the sum of its proper divisors (1940373143).

3665832681 is a wasteful number, since it uses less digits than its factorization.

3665832681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630480.

The product of its digits is 1244160, while the sum is 48.

The square root of 3665832681 is about 60546.1202803284. The cubic root of 3665832681 is about 1541.9047495926.

The spelling of 3665832681 in words is "three billion, six hundred sixty-five million, eight hundred thirty-two thousand, six hundred eighty-one".